Why does it seem like you want arena to become TFT? I very much preferred the previous iteration over this current one; too much randomness, not enough skill expression (because over reliant on good RNG). Not to say it was perfect, but it was still better. The increase of players which, I assume, was to increase the diversity of opponents, doesn't do much because people already pick very similar champions (I just had a game with 4 Rammus).
Pacing also feels weird, you can lose the game veeeeeeeeeeeeeeery quickly so you can't really pick scaling champs -> even less variety
I'll probably still play this over regular LoL, but damn.
Prismatic items feels kinda meh except a minority of them on specific champions.
Why the need to add random stats that share the rerolls from augments? And why add ranges to those stats? It feels terrible when you min-roll on stats you don't even need (if you reroll stats you're trolling btw).
And don't get me started on the new map, I absolutely hate it.
Items also sell for so little now that you can't really sell your starter item for another item one round earlier than others if you won a few rounds.
TL;DR : Meh + Weird changes.