Curious how you think it makes assassinations rotation more engaging. To me, it just feels like a button you press to attack faster, and thus deal more damage, that's all. If they wanted to un-prune, they should have brought back something like gouge so at least some decision making could be made in M+/pvp since gouge is a costly ability in terms of resources.
SnD is acceptable to return for outlaw and especially sub, and i've been playing around a lot on the ptr, but I just don't feel it for assassination. At most it will increase the skill floor slightly but do nothing to increase assassin's ceiling.