Currently as a Rogue subclass thief you get two bonus actions which you can use for Off-hand attacks only which can apparently include hand crossbows (which have an 18 Meter range and are totally broken).
You cannot sneak attack or make a main hand attack with those bonus actions, although NOR can you toss potions or vials or bombs around either.
So on balance I would rather lose the bonus offhand attack and get the ability to use my bonus action to throw fucking bombs at people, dash, or hide.