I think abandoning a deck should have limits. 1 time a day for free perhaps? After that it is locked for 24 hrs. That way legitimate bad drafts can be abandoned, while people just rerolling until they get their perfect draft have limits.
I wasn't initially against the decision to remove both the entry fee and the rewards from Arena, but after having experienced the new Draft mode, I definitely think that it was a mistake to do so. There really should be some sort of penalty for immediately scrapping a deck without even playing with it just because you think you can do better; otherwise, this mode will turn out to be even more broken than the base game. Assuming nothing changes, I don't really see myself playing the new Draft mode much.
RIP ArenaI'd like to be able to pick any card I liked from any faction. Might be fun if we all could.
RIP Arena