Is the whole "withdrawing after seeing next player's oracle card, mark and level without breaking win streak or counting as a win for the arena deck" thing fixed? It just feels wrong that my deck, after 2 days, has only been played 18 times, while others have been played much, much more.
On another note, I feel disappointed that, after the effort put into grinding score (of course, this had no previous motivation, although it did require effort and time), platinum players are penalized with being played fewer times than their lower-ranked gold colleagues (or at least that is the impression I have from the evolution of reward price). I think increasing the reward for playing in platinum, or increasing the reward per arena (AI controlled) deck victory could balance this. The first one would be the best, as it would benefit both Platinum players and Platinum T500ers.
Apart from that, the Arena is awesome.
EDIT: I am a Platinum leaguer myself, even if only level 61.