This thread is to compile a list of suggestions that would fix the rogue for those of us who are not currently happy with it:
1) Sneak Attack is too weak; it is just a worse version of Deadly Strike right now. When a rogue has advantage, sneak attack damage dice should be maximized; when a rogue scores a critical hit that damage should be doubled. Otherwise it can be left as is. By this means a fighter's DPR would still be superior, but once in a while a rogue could feel like there is something special about his sneak attack ability, especially when he gets the pounce on someone.
2) The rogue needs more rogue specific manoeuvres, some of which (preferably) don't amount to the rogue dealing direct damage. For example, I would like to see a power which allows a rogue to spend sneak attack damage dice to debuff foes in some shape or form; that debuff should be more powerful if it is used against an enemy who the rogue has advantage against.
3) If the rogue is going to gain fewer manoeuvres as he levels, the rogue needs to gain more of something else. Maybe more bonuses to skills? Perhaps the rogue, at level 5, could gain training in one new skill? Otherwise, he should gain new manoeuvres at the same rate as the fighter. I would prefer it if the rogue gains manoeuvres more slowly (ending up with 2 less manoeuvres by level 20, and one less maneuver by level 10, based on current progression), but the rogue gained training in new skills (2 by level 20, and 1 by level 10).
4) The rogue needs to gain something to balance out against the fighter's bonus attack. If the rogue gains manoeuvres at the same rate as the fighter, maybe a new skill would work. If new skills are used to balance out the rogue's slower progression in terms of manoeuvres then a new skill would be overkill. Something else would be required. Someone suggested dual wielding bonuses when two finesse weapons are used. I like that idea, though maybe those sorts of bonuses should be kept to feats. Perhaps at 5th level a rogue could get the ability to make a free skill check any time it makes an attack? That would be neat and fun! Otherwise, perhaps at 5th level the rogue could gain the ability to gain advantage twice per encounter (regained with a short rest)? Hell, perhaps at 5th level a rogue gains the ability to never “roll” less than a 5 on a skill check (if you roll 1-4 it counts as a 5). Whatever. Give us something of similar value, if not necessarily for the purposes of combat!
A combination of all of these four things would make the rogue attractive, to me, again.
Meanwhile, what I think is fine as is: I think it is fine that the rogue has 1 less bonus to hit, weaker weapon proficiencies, weaker armor proficiencies, and less hit points. I think that his 4 extra skills and thieves’ tools proficiency balance out against those weaknesses.