I agree that 4 wasn't really worth the money (if any) they paid for it to be made.
I know John Hughes is no longer with us, but maybe it would be nice for another Home Alone to be made, maybe going back to the McCalisters from #1 but now is the GrandKiRAB turn. Maybe Caulkin can make a Cameo, not seen him in a film for many years now and start his career again.
When HA2 was made it was in that era when everything required a sequel, Die Hard, Terminator, BTTF2, BHC, Batman, Superman, Alien, Rambo's & Rockys, Ghostbusters, Sister Act, Under Siege etc etc
Can't remember exactly which one, but on one of my dvd's it mentions the above on the commentary/extras, about the lates 80's/early 90's being a sequel-fest era.
Apart from Terminator 2, there was only Arnie who wasn't too happy with doing Sequels due to the flop of the Conan sequel, but made an exception for T2. It was on the basis of Commando that Die Hard was a sequel, but due to Arnie persistance they rewrote it into DH.