Greg Benage
Legend
IMHO, monsters are so much easier to tune as you say. There are lots of easy ways to make them tougher. Many you can do on the fly.
It may be easier, but there's two full books of monsters! And while I acknowledge it may be easier for some, it's pretty easy to fall down the analysis rabbit hole. Like, okay, I want to put save-or-suck and save-or-die back in, get rid of all the iterative end-of-turn saving throws. Fine. Now, does the saving throw proficiency system still work? If it doesn't work, what's the solution? What ripple effects does that solution have? If I do this for monster abilities, do I also want to reintroduce SoD and SoS into spells? And so on.
I'm probably just too lazy, and B/X is right there on the shelf.