Micah Sweet
Level Up & OSR Enthusiast
The issue with the MM is all the humanoids. They're going to want to re-write a lot of entries.There is a fair amount of shuffling, but so far all the basics components are still there.
Rogues still have sneak attack, cunning action, and uncanny dodge.
Bards still have spells and inspiration.
Rangers still have multi-attack and half the spells.
I see no need for a new monster manual.