I'm starting to get bored of it recently. I've got almost everything on farm mode and I'm just not a fan of the arena and pvp in general. There are this handful of OP heroes and others that are just useless. And I really do believe it's all because normal attacks cause interrupt/reset timer of other heroes.
That and facing 5* everything people who bought shit
I did get my first 5* though, and it opened up the soul shop, neat...except now I need to turn in hero cards/souls(whatever they are called) for 100 soul points. These work like arena points. Right now it is 960 hero cards to get enough soul points to buy the swordmaster guy. I actually think I have enough and considered it because that guy is completely rape when I fight against him, but I would have to give up pretty much all my potential star upgrades. Laaaameee