The Human Target
Adventurer
Mechanics aside, my main problem with the standard assassin is that the flavor is so specific. It feels like a paragon path stretched out over 30 levels. The new assassin feels more like what I think of when I hear the name of the class.
I actually like it better this way, since it stands out from the rogue class a lot more.
Seems heavily based on Artemis Entreri from the Drizzt books (once he gets turned half shade) and mainly the Night Angel books by Brent Weeks.
Which is cool with me.