For as much shit as we gave Matt and Trey back in the comfy threads for not having many jokes in newer episodes, writing comedy is actually really hard. It's easy to sit back in the audience and criticise it, and think that you'd be able to write better stuff, but when actually put in the position where you are expected to do it you fall flat.
Personally, I don't mind if we aren't constantly writing comedy stuff as we are still having fun regardless, and that's what's important. It isn't like we don't have jokes, but I'd rather they come naturally than be forced.
And besides, if we all wanted to do a 180 and switch North Park to some action adventure epic, or a character driven romance-drama series, a we could do that and as long as we all enjoyed it I don't see the problem. It isn't like we are an actual show airing on a comedy channel after all.