Not bad. I wasn't crazy about where the Marge story was going until it developed a little more (that is, past the health food store scene), but I did like it by the end. As for the main Bart plot, I like the classic feel (they've been revisiting the pranks in general lately) and it went more or less fine. I admit I was fooled a bit by the end- of-act-3 worm delivery (it reminded me a bit of Jack burning Skinner's car in CABF05), but also did work out it was for a sketch soon enough... what I didn't anticipate was that the creative prankster type would actually be a good match for a writer on a show like Krusty's. (Odd, too, since I'm about halfway through the new unauthorized Simpsons history!) I also liked some of the zingers from Lisa, the "Boner Way" callback, and the one baby CD lyric ("doggies and kitties don't last forever, but they do a lot better than fish!").
OPENING Shary Bobbins L to R (repeat of LABF15, though I haven't compared the animation) Ralph, Barney, Stu same as every recent episode... ??
DYN: ...the opening billboard has Dr. Otto's "Wellness Clinic" and later (IIRC) the health food store is "Wellness Foods"? ...Lisa's "loser" run has a few parts similar to Jim Carrey's in Ace Ventura?
Previous episode references 3F04: Milhouse imagines the sidekick with an e^i*pi+1=0 shirt; in 3D e^pi*i=-1 turned up 7F20: Ice cube with a fly in it (and elsewhere in the episode some annoying preachy talk about offensive plastics!) 3F05: All the bad food in Homer's stash was reminding me of this (esp. "Lard Glug!")
Meta-reference corner -"I think he's gonna ruin the show!" "He's about 20 seasons too late." -Lisa calling TV writers losers (over execs too - but doesn't continue through credits)
Other I'll see if it was mentioned in captions later, but what was the music in the end credits? I don't remember it from anything in the episode, but given the Jonah Hill guest spot, was it out of one of his recent Apatow movies?
Did anyone else's broadcast (esp. east coast, especially WJW in Cleveland) freeze on the Gerald/Maggie part of the intro all the way through the sax solo? I'm not too familiar with the different types of digital broadcast errors, though usually if reception isn't coming in too well out of the air the whole thing starts stuttering and doesn't do *that*.
And on tonight's American Dad ("My Morning Straitjacket"), almost the exact same thing with the pool cover just happened. It was accidental, but otherwise really close: a switch was conspicuously flipped, hand impressions were seen, and Hayley didn't get out for quite some time. Wow.