One of stengths of rogues are certainly skill checks (it's quite common for a rogue to get to a point where they can pick a dc 20 lock without needing to roll a die.)
Their in combat usefulness strongly depends on the amount of fighting you do per day. Currently there is no penalty for taking long rests after every single combat. So if you do that, classes like sorcerer or paladin who can burn all their ressources really quick are on top.
However, if you follow the DnD recommendations of having 4-6 encounters each day, rogues are in a quite good spot.
It can be a bit boring in combat since you basicly do the same thing every turn (get in position and then hit something with sneak attack). But since you control multiple characters, I don't think that'll be an issue in single player mode. If you are doing multiplayer (or at some point do actual DnD) and you are a rogue in a group with just full casters or people who multiclass, be prepared to spend most of the combat waiting for your next turn.
