I agree. I tried to give it more of a balance by subbing to GC, but they're actually the most active community here right now, so if you do that your front page is about 80% GC posts. It would help if a few more smaller left-ish communities created subs here, or if some of the GC users participated in the other subs more.

Personally I hope more non-political content takes off, I'll try to submit a little more.