Disclaimer: First, I dont read these forums frequently so forgive me if it's been asked numerous times already! Secondly, this is merely a suggestion, I absolutely am in love with this game and put in 300+ hrs since launch (this is my 3rd playthrough!)
I Would love to see a lonewolf option. Im currently trying a solo tactician run and though it's fun and challenging, I'd love to having something similar to DOS2. The main issue is not having enough actions, carry capacity, multiclass less feats, etc, even with speed/haste big fights get a little boring, exceedingly slow and repetitive (ie, kill, stealth, wait, rinse, repeat, etc), especially at lower levels (im currently level 7 in act 2). Plus, invis/stealth bugs out at times and resets all the mobs. I'm able to be fairly successful as a dark urge/assassin/gloomstalker (did all the fights/bosses) but I think playing anything else would be quite frustrating/impossible I would imagine. I know there are mods out there but I dont wanna mess with those or deal with messing up the game files, etc.
