I will answer to this quick since it's very easy
1. Hell no. Dragonballs are the most special thing to drop in this game. Trading them will make them nothing special anymore. Some ppl will go lazy and just try to buy them to get their wish. But Dragonballs should be a reason to play a little more active once DB hunt starts.
2. Yes. I like that one and was thinking about this too. Giving f2p players another option to get boxes would be nice. But i'd say 5 boxes are fair cuz some ppl can make up to 3 or even more wishes per hunt. Would flood the server with even more boxes which is a bad thing. Also, since it could be a DB wish, they would have to work for it. And that's why i say no to no.1. F2P means getting the good sh*t with work and dedication! And with this: Hell no again to no.1
3. Don't give a sh*t about that one. Ain't too special.
4. YES. This ruins the hard work that some ppl have to go through to get the dragonballs. I'm ok with losing a dragonball if time runs out since that would be my personal fault. But losing a DB just because i had the bad luck in that moment to get disconnected or the game crashing on me, sucks hard cuz it's not my fault. Also, i'd like to see an option in Shenrons wish menu (main menu of him) where we have a last option that says something like: "I don't need any wish right now" or something else. This way we can send Shenron away if we decide on not making a wish for some reason. But by doing so we also lose a db which is fair. Not sure if this option is needed tho. As i'm writing this, i try to come up with a good reason on why someone summons Shenron just to decide 10 seconds later to not make a wish xD
thx for reading.