If 2.0 is supposed to be more resource efficient, I would assume that anyone currently playing would be able to squeeze more performance using their current rigs. Still, a new benchmark would certainly be useful to people considering to subscribe when it comes out.
I was always told that 2.0 will be more resource efficient, but not in the way most people think. I was always told that the way the coding is and the way the servers are set up is that the game cant take full use of certain GPU's and will be reworked to use more than just a singlethread. So people will see there computer using more resources than it is now is what im thinking, because the game needs more, but its currently impossible to give the game all the resources it needs as it is currently set up.
If that is the case it will be more resource efficient but not in the way people are thinking.