My thoughts:
1. Too low chances for sp drop.
2. Too high cost in sp of everthing.
3. Pointless learning blacksmith. Cheaper is to use ingame blacksmith.
4. Quest getting harder when you leveling up. That leads to nowhere and you can't finish quest until you have A LOT of luck.
5. Too high cost of pet resurecting and they die too easily.
6. Atacking other players gives you nothing on higher levels.
7. Guilds are the best thing in this game for now but entry cost is quite disturbing.
8. Blacksmith guild is pointless.
9. Game is/was marked as beta. For me it isn't even an alpha.
10. Leveling is taking too much time. Most of players stop playing quickly because of that.
11. Too high cost of buildings. And they're too mostly pointless.
12. Almost no way to communicate with developers because forum is russian :/
Why the hell enemies can hit me on different z-axis and I don't?! =='
I really enjoy this game for like first 5-6 arenas, then it starts to get more angry each time. And like others said: key bindings are just dumb, they ruin completely this game...