rupture giving energy with venomous wounds is an assassination thing unless you mean relentless strikes which we still have. rupture did damage and applied sanguinary vein which made the target take more damage, which is what nightblade does. it’s a very similar ability with a new name and icon.
basically. trouble is the blades burst isn’t even big really. the other day i watched nahj do a blades kidney go with cold blood on a holy pally and take him to almost 50%. made me sad. subtlety just can’t kill on its own anymore.
kinda makes sense though when you think about it. back in legion dark shadow was 25%, not 15% like now. gloomblade was normally picked over mos despite legion mos being 2-3x stronger than bfa find weakness.
backstab does nothing, gloomblade does nothing, shadowstrike does nothing. eviscerate does a bit but we generate combo points so incredibly slowly outside of dance that our sustained dps gets outhealed by a dpsers passive self-healing. i wouldn’t mind that so much if we did huge burst to compensate. that’s how we were in mop and wod after all. but we don’t.
burst is decent on squishy targets and really low on tanky ones. it’s almost never enough to actually threaten to kill anybody on your own, you need your partners to help you.
in terms of actual damage the only thing sub is half-decent at is bursting down squishy targets like rogues, mages and hunters. and even then we’re average. the spec isn’t so bad mechanically, it’s not mop or wod levels but it’s pretty similar to legion. the damage is just way too low to be any good.