IF FD would give the starting scenario training grounds a mult-player option ED would be able to have something similar but with a larger arena.
Why?
We already have the "PU Module" in ED. There's already an accessible area that's one third the size of what's planned for SC ever. With Beta 2 and around 500 systems, it'll be several times the size of what SC plans. And with the final release.. well you get the idea.
There's really no need for a "multiplayer arena level" because Elite is not a deathmatch space shooter. What they need to flesh out, and FD knows that very well, is the actual game content, the stuff that keeps you playing, the *reason* for why you'd ever have a fight in the first place.
I don't need or want SC to feel the same as elite. But they sure could've focused on one thing first and get the core gameplay right, instead of doing all at the same time and have nothing feel right.