I disagree about nothing to do at level 50, actually it is pretty standard you hit cap, do hard modes (heroics), gear up, raid (normal), raid (heroic) rinse and repeat. If that was all there is I would have quit after the second week - swtor offers an amazing story plus end game content, which guess what? Is going to get better, because new features are going to be implemented.
It is simple really, if you do not like the game, do not play it. Yes there are dead servers, but must say after playing WOW for 6 years, I ran in to a lot of dead servers, also there was not much of end game content in vanilla as well? Remember? Vanilla when you had to grind battle grounds and keep on grinding and grinding, no rated battlegrounds, no arenas. Now compare swtor to that.