Okay in this post I will explain why I, as well as 90% of the community think the upgrade system is awful and needs to change.
1. Even in DBO TW, when upgrading an item without a white stone, the fail card DID NOT downgrade the item by one.... Why is it like this here if we are trying to replicate TW? This is the first thing that needs to be changed since fail should just leave the same upgrade level even without a white stone.
2. For god's sakes, please adjust the downgrade with the broken card. If you are not gonna make it like it was at an earlier date (no downgrade), at least make it so that it downgrades by 1 NOT by 2. I wanted to try this system out to prove my point and I spent $500 in one day to see if I could at least get a +15. Guess what happened, I ended up with a +8..... The rates are ridiculously to your disadvantage and not only that but every time the broken card shows up, -2..... At the very least, the downgrade with a broken card using a white stone should be lowered by -1.
3. Another point that makes the system awful is the fact that purple stones (and I am guessing green as well) DO NOT have a 33% chance for each upgrade number(+1, +2, or+3). I swear it feels like 80% of the times it is +1 and 20% of the times +3; (Which makes the use of a purple stone, which btw is 11 times as expensive, a COMPLETE WASTE). In DBO TW, it WAS NOT like that. There was a 33% chance for each and you were equally likely to get each number.
4. The current system literally makes red/blue stones COMPLETELY USELESS since again, if u get very lucky, u might get +1, and then go down by 2 on the next upgrade try. LOL
Now that we got that out of the way, I'd like to point out that the upgrade system we had in the past was way better than the current if I had to compare them. Getting a +15 was Actually Possible, now it seems like it isn't. Even though before it could take 80 stones just from +14 to +15 ( From experience, not making anything up), it was still possible to get the upgrade if u persisted. Now u could literally get 30kkk and end up with a +6 lol.... Anyways I hope that these points are not overlooked and that they contribute towards improving the upgrade system.