I close to never footstool, so I only footstool intentionally on the very rare occasion I play Mario. Even then, I use Tap Jump for the footstools. So my preferred type is type 3, but my input isn't all that important.
I disagree with you there. Minus Roy feels great in 3.Q. I'd like to see little to no changes to Roy in 4.0.
The Mega Man PSA? Yeah, that is OP. You can jump out of it, hold down A for an endless stream of lemons, and you can move while doing it.