There doesn't seem to be a way to disengage from combat. Without spoilers my main character went left in a fork in the road rather than right where an NPC was and triggered a group of level 2 enemies when I was still level 1. I dashed around a corner and hid. The enemies stopped pursuing but combat led on for many rounds until I eventually just reloaded my last save and went right instead.
I agree with everything you said regarding the rogue status ; I've made comments in other posts concerning spell scrolls for everyone, action economy and disengage as a bonus action...
But this, this is also a major problem I faced when playing DOS:2. I've had countless times when after dealing with a combat (so surfaces everywhere still lingering), one of my characters, being linked to the others, went all the way to join them, walking around the surfaces to avoid damage automatically, and eventually ending up triggering another encounter at the other side of the map, isolated and ready to die !
