I have been experimenting a bit more with TB mons. I think even more now that it has been underutilized in the meta, even though it has gotten some attention. You can do some really dumb things with this if I'm being honest. It might not be as simple as saying X mon is broken, even though there are a few I want gone myself regardless of if we took action on TB.
One of the best moves GF ever did, in my opinion, was getting rid of Hidden Power. The lack of it allows you to be much more confident in matchups you are supposed to win or be advantaged on, thus easing constraint on the builder. Tera Blast is Hidden Power on steroids. It wouldn't solve the Tera problem as I see it, but banning it would address several other issues.
Regieleki without TB could also be nice for balance. Volc can stay banned, though. That thing has been banned way too much for me to want to see it in gen 9 OU again.
One of the best moves GF ever did, in my opinion, was getting rid of Hidden Power. The lack of it allows you to be much more confident in matchups you are supposed to win or be advantaged on, thus easing constraint on the builder. Tera Blast is Hidden Power on steroids. It wouldn't solve the Tera problem as I see it, but banning it would address several other issues.
Regieleki without TB could also be nice for balance. Volc can stay banned, though. That thing has been banned way too much for me to want to see it in gen 9 OU again.