OodleNoodleOmpagis
Sober AMA
I would like Mashing (grab/sleep breaking) in a perfect world.
-It essentially has no human reachable limit towards how good you can get at it (barring someone mastering a Brawl quirk involving d-pad and custom controls or something)
-Can be done in various ways and forms (aside from rotating the control stick being the most essential)
-Rotating the stick can screw up your DI from fast throws, and hitting buttons possibly performing an accidental move (though unlikely you'd get out of hitstun fast enough to)
-Is intuitive to "struggle" and "mash" to break out of things, making you feel like you really did mash out of something (I don't find it that intuitive for breaking out of sleep/shield break though; my mind would pry better imagine pressing A while they're wobbling side to side like the Jinx mini-game in Pokemon Stadium 2)
But we have to consider its effects on the controller, our hands, and the people who's hands might already be at a detriment (and why we're testing this ability in the first place).
You don't have to go all that crazy to get a decent mash, but at a high level you're like anything else giving yourself a detriment by not doing a near optimal mash.
https://www.youtube.com/watch?v=mgsh36W9u0o#t=375 look at Dr.PP lol, and
https://www.youtube.com/watch?v=8Lll3Jj2PWw Rat creating the percussion for his new song Set me free
It's essentially awesome to watch people have to physically go nuts for a split second to try and break out of things (punishing them IRL). And is a unique skill (giving certain players a talent that other top mental players might lack). But like I said I don't appreciate it on myself when my hands don't feel like mashing, and sure won't appreciate it later on as years go by: when there's many methods we could think of that could have similar depth that don't rely on pretty much physical spasm. There will always be a miss for it though if it was replaced, being it's a unique moment in the game where you don't care what you press for once and just need to go crazy.
I can't fully comprehend your proposed method (at least for now): you should make a video on it or some kind of picture guide
And this is all talk I mean towards grab breaking. Stuff for single button mash (MK/Mario/Luigi) is probably a lot more dumb and unnecessarily tiring.