This is probably the happiest I've been with the artwork in this comic in a while. Which, of course, means I will hate it a month from now, but I'm going to enjoy it while I can! *Stares*
The only thing that sort of bugs me is not showing the cafeteria behind Sarah. I actually spent some time on a background to put there, but even with trying to go with the minimal approach, the end result was "this is way too busy, making it any less busy makes the cafeteria seem weirdly empty, don't bother including it and claim artistic license you jackass". So I didn't. And I claim artistic license.
In my additional defense, Susan clearly couldn't actually be behind Sarah to make those objections and be where she's standing in panel four, so artistic license is a given anyway. Susan can, however, totally make that scary face if she wants to.