Aye...that´s my biggest concern for years now,heck I´ll be happy even if they manage 50-70 players per instance just if that can work smooth&stable.....atm from this perspective that kind looks like a dream.....
To get even close to those numbers and 60 fps they need to "dumb down" game very hard - remove their fancy ship damage states, cut hard on graphics, make physics simple as possible and make AI as dumb as possible...
I am quite sure, that at some point they will do it.