I'm glad they take a break. There's already several games in development I'm interested in for the PS5 but I don't want to buy the console in 1-2 years at the very least. A next gen KH game being announced too soon would make me want to buy one on impulse, only KH has that power over me. I'll also wait for a price drop next year before I get MoM, that will be enough to feed my KH hunger in 2021 anyway. That, UX/DR story updates and I still have to replay KH3 to get the PRO codes trophies.
They can take ther time to make sure the next KH game is as good as it can possibly be without having such a long developing time as KH3 did.