How do they play in terms of DPS? I feel like people de-select them from raids? Do you feel stealth mechanics then need a re-work?
Stealth suffers from reaper autodetect (the weaker reapers; the upper tier do not) and quest design (life-shielded progression, bloated red-named fights, oozes wierdly co-habitung so as to detect you etc), and faulty mechanics (they will mysteriously know where to find you). Stealth benefits from quest design too: inactive mobs especially (Spiders and Flies, for example—you can walk around ettercaps in sneak and they remain inactive, similar to earth elementals, sitting harpies etc). There are unintended stealth buffs; From the Shadows in SD and any proc like invisibility guard just seems to make mobs jump around in a stupid tizzy.
I could solo every quest on R10 if not for the red-named boss. Even with every clicky going with dodge etc my toon cannot drop them fast enough.
Raids are a mixed bag for assassins. Mine shines in Project Nemesis, Vision of Destruction, Chrono, Baba etc—essentially raids where you can actually assassinate, whereas constant beatdowns like Skeletons, I find I struggle. That is just my experience. I am sure there are better assassin players with more PLs and better gear that can take hits better, eg Tronko’s endgame assassin posted a while ago.
Finally there are attacks that do not break stealth other than assassinate; an unintended boon that is a lot of fun combined with adrenaline. I can bluff pull some reapers and drop them
in full sight while remaining undetected. It is slow but fun.