^ That's a fair assessment. I think I agree that they're starting to stretch out for ideas with where to go, but my one hope is that even if season 4 is the last, they get to tie up the story properly and give it a decent end. It would be a shame if it was unceremoniously dumped mid-season.
It's the fact that I like all the characters and their various stories and every episode has at least one laugh out loud moment that makes me want to keep it around for a little while longer. Providing, of course, the quality is kept as high next season as it has been so far. I am a great believer in going out on a high, and I'd prefer it to be at the showrunner's request rather than the network's.