I agree. I avoid Arena now simply because it’s a lengthy endeavor.
I like the draft mode idea for it, but some creatures really don’t fit or scale well. Random spell gems / random artifacts really make it a crap-shoot, too. The Arena isn’t difficult, it’s just a bit frustrating when you pick what would typically be a good attacker and it does little damage and doesn’t have any usable spells.
I also lament the fact that we can no longer “build” an arena team using our creatures. Part of the reason I use the Stable System was to have an Arena Team there that I can pull out.
Maybe have two (or more) Arena modes. One draft, one bring your own team. I’d even like to see single creature (non-nether) or other modes as well. Vary the reward by mode.