I'd like to see more mobs in groups. When the game was yet to be released it sounded like SE planned to break from the 'everyone gangs up one individual woodland critters' and have it where you'd go up against a pack or band of enemies.

Outside of quests you never see it, and all it entails in quests is you just need to deal with more monsters at once and use AOE. There is no real "AI" behind it beyond mindless mob. I'd prefer it if we started to see more enemy groups where different members filled different roles. A tougher front line enemy that tries to keep you busy while their weaker damage dealers try to get at your side or back for a rear or flank bonus from a distance for example.

Right now it's predominantly 'tank and spank' or 'Play hokey pokey with monster AOE'. It gets the job done, but c'mon! We've seen this same song and dance since the 90's in MMOs.