In HTSAS, Jimmy sends his teachers into a magical, mystical world and the school children go wild, until the parents come and take over. The episode in itself wasn't bad, it had some disturbing scenes with Carl's parents though, but I don't think it was a good idea to put it together with LSTN.
LSTN would have been the perfect series finish, if it had been a 30 min episode, instead of just 15 minutes. There was so much cute J/C and for once, the storyline was almost entirely focused on Libby! The ending, as everyone undoubtedly knows, was what many fans had been waiting for, for a very long time. One can only hope know that we get one more season, or at least a spin-off of the show, to see where Jimmy/Cindy relationship will go now.
Until then, I am contenting myself with fanfics!