Here we go again with another tirade about why everyone should quit their jobs, sell all their clothes/furnature, and live in a box inside your mothers basement for the duration of your life to play an obsolete MMORPG just because. Short answer- No.
Long answer:
Before I start I would like to say that you shouldn't compare dbog to another game you like or love.
First sentence- Don't compare DBOG to better games, because... er... reasons. The only reason I'd think of comparison is to illustrate how features in this game fail to achieve their goal, whereas in othergames this isn't the case. Minor adjustments could easily be implemented to correct these glaring flaws. Asking us to disregard these horrible mistakes is just an open admission at how terrible this game is. Your solutions are to make things worse, thereby highlighting the few good features. Words alone cannot express how stupid and toxic a mentality like that is. That you should have to think "Hmm... lets make this game WORSE to make it better" is beyond comprehension. Furthermore, I do not hate you, or anyone, for arguing an opinion I disagree with. Afterall, what would be the point of conversation if we hate each other?
I disagree with you, I do not hate you.
1. Bring back broken card
The problem with "no broken" is that you only need to farm your gear once and after that you are done with pve. So because your gear can never be destroyed / deleted after some time we will have more items on the market then we need...
2. Increase Upgrade reduce on broken card when using white stone
Right now if you are using a white stone and get broken you will lose 2 upgrades. Back on retail it was 4-6. We need that back. Upgrading should be really risky but at the same time high rewarding. +6 Should be the normal upgrade for average players. And only if you have alot of money then you should upgrade your gear higher then +6....
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Yes, that's how games work. You work to get a particular piece of gear and armor to equip your character with, which allows you to farm more difficult opponents, etc. Rinse and repeat. Are you seriously trying to argue in favor of a system which outright deletes your progress for NO OTHER REASON other than to limit your progression due to the incomplete nature of this game? That defies all logic. No game developer, no programmer, and certainly no serious player would argue in favor of a system that can delete progress, just to make sure that the limited content, which is already not worth working for, all the more difficult to get. The goal of game design is to reward players for their progress, not punish them for making "too much" progress. It defies all game design logic!
3. Reduce droprate of Upgrade Stones
Reduce the droprate of upgrade stones. It should be hard to get upgrade stones.
4. Reduce brown boxes extremly and increase the chance to drop good effects
Make the price of brown boxes in cc dungeon much higher and don't put to many brown boxes in events or cashshop. Gear should be dropped with the right effects not switched into the right one.
People should farm the right gear in open world, tmq, ud, bids. Farming should be worth doing not something you do only for "fun". But for that the chances to get a drop with good effects needs to be increaed. It shouldn't be to high, you should not get a good item in a few hours.
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As if Having to grind for 6 hours a day just to get a few dozen stones which aren't even capable of brining you up to par with most end-game related content isn't already difficult enough, you're actually arguing that the grind should be made more tedious, less rewarding, because it makes you feel good about your progress. That's not an argument, that's just penalizing the entire player base for wanting to enjoy this broken game, and you feeling left out because you feel there isn't already enough of a huge gap between new players and old. Newsflash- Of all the new players that join, few ever even make it to the level cap, and the ones that do quit the game almost immediately once they see that the only thing left for them is an 100 hour mindless grind to get gear that isn't even rewarding.
You even admit that only the rich could afford end-game content. All this does is WIDEN that divide between cashers and non-cashers, not lessen it!
Your solution: Make it HARDER. Do you have a job? Quit it! Relationships? Who cares! Responsibilities? Children even? Pfft, abandon them, and play DBO. Forever.
5. Make everything tradeable
Every item should be tradeable. Some people don't want to farm but then at least the guys that do the farming should be rewarded by the players that want to cash their items. This way the "farmer" and the "casher" would be happy.
That's... Actually not a bad Idea. An Open economy would allow for the easier distribution of otherwise unobtainable items. It allows for players with not as much time to play alternative methods to achieve the particular items they want. If you dont have time to farm Gold Coins, this allows for the purchase and sale of them. The sealing system effectively prevents players from obtaining the gear they want by locking it behind rng, however this system would allow for the better distribution of items and allow for more economic opportunities. This would have major implications for the in-game market, and is actually a very good Idea.
6. Remove crafting
Crafting is way to fast and easy. You get nearly the best gear for doing literally nothing. You get much more craft items back if you break the crafted items than you used for them. Back on tw crafting was released much later with lvl 70 cap where it didn't really matter but back then it was much harder and more expensive and more time consuming to craft. I would say just remove crafting
And here it is- the nail in the coffin if most (but not all) of your arguments. That you should have to REMOVE features to make a game better is the pinnacle of bad game design. It's one thing to make worse the features that are already implemented, but to outright remove features that players unanimously use and enjoy is just ridiculous- NOBODY would vouch for such a decision. They might argue how the system could be changed and reimagined, but to remove a system so inherently tied to the metagame and in-game economy is beyond all reason.
tl;dr:
Removing features does not enhance a game.
Increasing an already insane grind to something effectively impossible to maintain without giving up your life/responsibilities is not good game design.
Ensuring that cashers are given all the advantages in the world does not, in any capacity, contribute to the longevity of this game.