I retired from the game because I got bored. The arena gives me new reason to play. On that account, the arena is brilliant.
I've been playing silver with >95% win rates and winning a ton of rares. Maybe not as fast as as T50 with 20% farms, but I actually like fighting real and unique decks.
The deck building challenge for platinum is the best part. Getting to build with 3x mark opens several deck options that would not work otherwise.
you were bored of AI3, T50, FGs, and PvP. your reason to play again is player inspired AI5? and you like designing a FG deck that you never see in action (besides testing yourself against it)
not sure if serious
the basic problem is that our decks didnt change! in fact, our decks have less variety than ever! creating the FG content for the developers is all well and good (and smart of them), but lots of deck types disappeared that were previously viable in balanced pvp. the only thing unbalanced about t50's real decks was poor AI, which
still exists but gets fogged over by deckbuilding put on steroids.
i would go so far to suggest that elements has given up on balancing pvp anymore. its too bad. some rotational deckbuilding rules, a 30 second turn limit, and a ranking system is all it needs. THAT should interest a seasoned player...not farming a variety of derpy AI and creating broken decks with unfair advantages.