It's not so much Content, you can avoid that for a while. Its customization and space. Look at just the sheer size of worlds or zones in other games compared to Swtor. Its linear and limited as it gets. You can't backtrack, interact, or customized anything you do but same graphic gear. That in my opinion is the killing point for most that play this. If they added size to each world you go on. Making it multiple quests for multiple levels. Yeah they would get more people that would be interested in playing because it's a difference. People grow tired of the same thing. The oh you leveled twice? New planet gets old fast.