CapnZapp
Legend
I much prefer just a (cha) roll, and then the player can suggest what proficiency they'd like to apply and how. Hang out in the temple district? (cha) religion might work. Or (cha) persuasion. Or (cha) intimidate.
My takeaways from this thread?
I like might. It's a definite gap in the current skill lists.
I want to roll acrobatics and athletics into each other. They seem redundant when I can choose the stat the roll uses anyway. Also see the next point about their declining value.
I want to remove skill checks from the combat system to fix 'monsters don't grapple well' and related issues. So grapple and the like will henceforth be an appropriate attack roll vs a saving throw.
My personal flavour of investigate vs perception is one of active vs passive: ie - investigate applies if you have to do something, perception applies if you just stand back and observe. Investigation checks tend to have lower DCs, or make more things possible. Perception is able to be used quickly and usually more safely. Passive checks are reserved for one half of opposed checks or so I can eyeball things I can't be bothered with a roll for.
Good thoughts overall.
Since I don't want to completely overhaul shoves/grapples/disarms etc Might is my solution. Any "mighty" monster get proficiency, which fixes the worst WTF moments visavi grappling.
Combining athletics and acrobatics is an interesting thought. Especially with Might in the game. Do you have a suggestion for a name? Gymnastics? (The core difference between Might and either of Athletics and Acrobatics is that the latter are things you achieve by training; the former are things you do merely because you're awesome)
I tried the active/passive approach, but that was sabotaged by the module itself, which calls for Perception rolls even when the players aren't actively searching. In the end, I've decided "Investigation" is simply a frankenskill with hugely inconsistent usage that I want gone from the game, so I've removed it.