What is it exactly about Rogue do you think provides it strong DPS? You realize that their only DPS source is Backstab which locks them to using Karacha Set, which the crossbow in itself is not very good in the endgame right? The only major appeal of Rogue at the moment for general PvE is Sneak Hit which lets you forego dexterity to get your critical hits from that.
Weapon swapping is barely functional at world bosses given the insane FPS drop that everyone is susceptible to, no matter how good your computer rig is.
Fletcher has the strongest DOT in the game that does 50 hits of damage by itself over the course of 15 seconds, while you’re free to use any of the Ranger skills (which that Rogue also used) and fill in any empty moments when cooldowns are up with any of the 0 CD skills that do ridiculous damage (e.g. Crossfire, with 150% explosive damage).
I don’t think I can convince you that Rogue in its current state is incredibly underwhelming outside of a single circle for utility. I can only tell you based off of experiences partying with both as well as competing against both that Fletcher has always been the stronger class.

