TL;DR but currently my guildie and I are level 50 Assassins and I will say this: while we have little complaints about the benefits or lack there-of from stealth, we feel as if we are the squishiest class with lackluster dps. Either buff our survivability (He's tank spec, I'm DPS spec - Deception) or buff our burst. Sure, our dps is fine. I do great in PvE and I'm pretty high on the damage meter, if not first in Warzones but it takes me absolutely forever to kill someone while everyone else seems to get kills in half the time and certainly can almost one or two shot me.