It's my understanding you can change the timelimit and fraglimit (using /timelimit and /fraglimit). If we want 15 minutes, can't we just vote it into servers? Or does that only work against bots?

It would be interesting to give fraglimits a test. Maybe a small online tournament? You know what they say... insanity is doing the same thing over and over and expecting different results. Well, fraglimits would certainly be doing something different.