Jeff Carlsen
Adventurer
Some of the most common should probably belong in the Monster Manual, but I personally would benefit more from a book dedicated to NPCs. Something akin to the NPCs in the back of the Pathfinder Gamemastery Guide, only bigger.
A lot of people did indeed. But they were wrong - those pregenerated 'advanced' monsters in MM4 and MM5 are very very useful. Indeed, I made more use of those advanced monsters than I did of the entirety of the Fiend Folio or MM3.
Fortunately, WotC saw this, and so the 4e Monster Manual featured several different versions of common monsters, at different power levels and often covering different roles. So I would expect (and certainly would hope) that they would do so again.
(What I liked rather less about MM4, though, was the inclusion of pregenerated lairs for several creatures. They weren't really detailed enough to be used as-is, and so took up space in the book without saving the DM enough time to be worthwhile. IMO, of course.)
Some of the most common should probably belong in the Monster Manual, but I personally would benefit more from a book dedicated to NPCs. Something akin to the NPCs in the back of the Pathfinder Gamemastery Guide, only bigger.
...and just to go with this for a minute...What constitutes "low, medium and high" levels?
Now, I'm sure we can just say "whatever the default of the game will be" and that will be perfectly acceptable to everyone. Right? So everyone knows/wants the default of the game to be low levels at 3, mid levels at 6 and high at 12. That's fine right?
And yet, as Li Shenron said, those were by in large a waste of space.
By the time the MM4 and 5 came out people had years of experience creating new NPC/monsters with levels.
That is why I think Pathfinder released a great book with the NPC codex, which gave 20 examples for every class they have. 20, that is one NPC per level per class.
But that is something I haven't seen a solution for at all, especially with MM4+5. 4 and 5 were just a couple of humanoids with pregen blocks that were taking up space that could have been filled with cool NEW monsters. I know, new monsters in a new monster manual, quelle surprise.