I am not familiar with that book, but I can say I definitely don't want the MM to be a stat book only.
Most definitely. But I feel there's room...quite a lot of room...for compromise here.
As a B/X fan, that's way more detail than I want or need. Give me single paragraph long descriptions and 4, 5, or 6 monsters to a page!
Nooooooooooooooo. That what they did in 3e and 4e and it was crap, give me 2e MM any day.
Yeah. See, this is what I mean. There has got to be a nice medium in here, between 3-4 monsters per page and 1 monster per page (possibly taking more than 1 page!).
I think the 1e MM and Fiend Folio kind of started with the idea I'm about to present, but never really formalized it.
I'm a sucker for detail. Generally speaking, the more the better, especially when it comes to fluff. Stats are stats are stats and there's no reason a thorough stat block should change from monster to monster. Some just have a bit more because instead of "Special Abilities: none.", "Special Abilities: xyz" will take more room.
They should formalized the descriptive blocks. Things like normal [real world] animals or even giant versions, and simpler "mindless" or "animal intelligence" creatures (stirges and the like) probably don't need to take up an entire page with descriptive fluff. I don't need a full page on what bears are and what they do. Some things, like spiders, where there are many multiple types with differing attacks or habits/habitats, fine they need a little longer simply because you have to detail the differences between species.
Sapient creatures, particularly humanoids, would/should include things like societal structures and general societal attitudes/outlooks, ecology, etc...So they get a longer description. I could see a full page about elves, dwarves, goblins, orcs, etc. Solitary "monster" critters, like Ettercaps...Owlbears...or other things that are essentially "bugbear/ogre/troll" reskinned to "spider-guys with web-making abilities" go somewhere in the middle...since there is no "culture/society" to describe.
And, of course, the "big categories" of critters: dragons, giants, demons, etc... get their "sections" with common traits, so they'll continue to take up multiple pages for these 1 type of creature, and then shorter individual type details...which could be shorter or longer depending on how detailed they get with their backstories/societies/interactions/attitudes, etc. etc...
I would like to see something like that. Animals and, essentially, "animal" type creatures are shorter, individual fantastical critters maybe a bit more detail (since they is no real world knowledge to assume) and then long humanoid entries and large category monsters taking the most space, page wise if not individual entry-wise.
So, something like that. I don't want a "stat block" MM. That does nothing for imagination or creativity. On the flip side, I don't need a uniform page and page after page of forced/explicit shlock (which may or may not be how I want to creature to be in my world/game) simply cuz we need to fill a whole page for each creature.
Somewhere in the middle...that's juuuust riiiight.
As a "PS" re: Ettercaps eating pixies to become aranae...in B/X at least, weren't they "Good"?! or, well, "Lawful" in B/X terms. Why would an ettercap, low intelligence or not, WANT to eat something that would make them Lawful [implied Good]? Then become a magic-using spider-thing and, well, go find others of its kind and become part of a society of nice spider-things? It would ruin their beautiful wickedness! I could see them HUNTING pixies, hating faye of all kinds, to stop the transformation of others, but certainly not eat them willfully.