I don't even play a Rogue and I think they should be top DPS when played correctly.
Pures should do more than Hybrids, blizzard has states this etc.
Melee should do slightly more damage than ranged (5-10%) because it's a lot easier to play a Ranged than a Melee (If you don't agree, try Mimiron).
Seeing that Rogues are the only Melee Pure class, they should be the edge in DPS imo.
Pure Melee > Pure Ranged = Hybrid Melee > Hybrid Ranged imo.