Some achievements would be a cool addition. Maybe make them give you passive bonuses, so players have something to aim for other than normal progression.
The current way the stat reset system is sucks. It'd be WAY better if, instead of the ammount of gold increasing by 1000 each time you reset, it would be much better for the gold cost to be calculated from the character's level, for example, a lv 51 character would take 51000 gold to reset the stats.
It's Brazilian Portuguese though.