Rogues need a field of expertise where they could shine, because they underperform in combat compared to the other classes. Maybe make them skill-monkeys again with a lot of skill points so they could give some use to a party outside of combat. For this, some skills need to be redone, particullarly stealth. Maybe more crafting options via skills, stealth could include pickpocketing, stealth + mechanics could make some encounters easier etc.
Same goes for out-of-combat magic use.
Daggers and stilettos should be an Option for stealth attacks. Maybe they get a flat Bonus or a different multiplicator. As it is atm it's pretty much counter-intuitive.
Attack speed mechanics are messy.
Multiplayer or coop would be nice - but I guess it doesn't fitt with this kind of game.
Throwing knifes
A lot of meaningfull building options would be nice. More options for RP-purpose are better than 100% balance.
Smarter IA and interactive fighting like creating stone walls or walls that stop ranged attacks.