I feel that killing things don’t grant any bonus(for all the group not only for the one who actually killed things). May be the “Ranald gift” is the hidden bonus i don’t know about that but if not i suggest to add some more loot or XP when more mobs have been killed. Because if you’re looking for “fast” loot or xp the best way to do it is to rush tome and grimoire and then the end of the mission which look stupid because what’s cool about the game is killing things with friends and people (at least it’s what i find cool). I’m not very good at english so please forgive mistakes. Either way this game is lot of fun.
I would also love to have more class and more talents or even more items to equip for example armor which actually change my skin AND my gives more stats. This part is less important but would give players more reason to like the game. And will also give more things to do if you wish to complete the game.