I dont see the harm in banning a character for 6-8 weeks from tournament play.
The problem is, when new characters are released for a game, you never see them played by serious competitors in tourneys shortly after release... Unless they are broken - Or you have a character loyalist situation where the player has just been waiting for the character they play exclusively to drop - but that's a fringe scenario. Seeing new characters is great, seeing diversity is great, but seeing broken horseshit is demoralizing and disheartening and it, in my opinion, turns prospective players away from the scene - Which is something the FGC as a whole can ill afford.
I dont compete, I'm just a spectator, so speaking from my point of view, the ban is healthy and just plain makes sense. It is very hype to see a new character and new shit, but its not worth undermining the health of the competitive scene for that. If we wanted to help push the DLC (as a thank you to the devs and to aid in sales of a game we enjoy) we could try to set up a side stream or salty suite type situation after or before the primary tournament that's open to the DLC. People get to see the new character and get to watch new shit from top players, but that doesn't interfere with the core tourney.
A quick edit..
Ive read a comment or two saying that when a game is released we should wait to have tourneys because release characters can be broken too and no one knows what's going on..
I understand the logic there, but the situation is different. A new game getting a new tournament is essentially EVERYONE stepping in to this kind of acceptably unknown environment. No one really knows what's going on yet, and you will def have broken (or broken until figured out) stuff flying left and right, but thats when the entire game is new.. In that situation, it can be fine. Not fine in an 'oh no biggie' way, but fine in that since the game doesnt even have a shaken out meta yet, and no one really understands anything yet, broken and broken-seeming stuff is more expected and acceptable. The stakes arent as high either usually and even if they are, everyone is entering in to this with the understanding that none of them know wtf is going on and who is bringing what to the table.
It should also be noted that holding back early tournaments holds back early exposure, which can potentially kill a game before it ever really gets going.
I think early tourneys should absolutely be allowed and even encouraged, but I think there should be some emphasis on the part of the announcers and those in charge of the tournament to kind of reiterate that the game is new and we dont know how things are shaping up yet, etc etc.