Rogue only gets one attack action so it really can't compare with other DPR builds. Yes that one attack is powerful, but when there's multiple lowish hp enemies on the battlefield, it kind of sucks. When you multiclass to gloom stalker, you get multiple attacks and can do some real damage. Those thief bonus actions are not that useful for damage dealing because you can't get proficiency bonus to your off handed weapon.
Gloomstalkers are quite powerful and interesting as a class.
It would be a fun matchup with the Dark Sniper Rogue Build - versus the Hunter/Gloomstalker build
However, I don't yet know what the full Rogue kit is yet, can we set traps, do we specialize in poisons?
Also I don't know the BG3 full Gloomstalkers kit yet, can Gloomstalkers cast a spell and attack? (probably) Do they get BA hide? (probably not)
Although, part of my response got cut off and I was mainly talking about how Rogues are particularly useful for breaking into places, but can also hold their own in combat.
