I see your point regarding Abed, I just don't really think any of these characters are going to develop beyond their tropes. The tropes are part of the show's charm. That being said I would like to see some development and character evolution.
Regarding seeing the "never seeing the show again if last night was their first exposure to it" comment, I'd have to disagree again. This is the type of show where you've gotta watch two or three episodes to get into it. I didn't quite frankly get into the show until I'd watched at least three episodes. You can't just watch one episode of "Community" to judge if you're going to continue watching it or not as a first timer.