An episode about end times probably would have been more fitting back in May when Harold Camping was getting more attention relative to how much he got two weeks ago, but "End of the World" is still a fun episode, mixing the kookiness of the people with some great character beats--Ron profiting from them, Chris discussing reincarnation, and Leslie trying to deal with her feelings for Ben.
Entertainment 720 goes out with a bang as Tom and Jean-Ralphio blow the rest of the their money on a lavish party. I'm pretty sure they spent more than the 10K they actually had, so their finances are in even worse shape than they think. Generally, Entertainment 720 added nothing of value to the show and was there only to show Tom and his lavish parties. It didn't really affect anything going on in the Parks Department. Now that Tom will presumably be back with the rest of the characters, hopefully he'll be better integrated into the show.
April and Andy are off in their own end of the world events as they try do as many items on Andy's bucket list. Most of the stuff is funny and April's involvement beyond her usual passive self is very sweet.