So I guess the idea is that at an edge, the backward momentum of a skid has nowhere to go, and since there's less momentum you have to decelerate for when you move in the opposite direction, you get more forward momentum.
Certain characters have been doing this outside of the edge for a while; this was really good on Yoshi in Brawl, and this tech is basically the equivalent of shellshifting for Squirtle, but requiring an edge for some characters to really get much out of it.
The secret to its usefulness isn't really touched upon, but is briefly shown; the end of your skid animation seems to be the equivalent of the neutral position. You can let go of the stick at any point in the dash turnaround away from the ledge to be in neutral while still sliding, giving you movement while using normally-stationary options, such as Jab, Grab, D-Smash, or canceling the skid into a run backward to do it again. This is big for characters who slide a great deal, since they have more flexibility; it looks like Greninja would be a noticeable boost from it, for instance.
I'll probably make a video playing around with that idea. It could be a bigger deal than initially thought.
Certain characters have been doing this outside of the edge for a while; this was really good on Yoshi in Brawl, and this tech is basically the equivalent of shellshifting for Squirtle, but requiring an edge for some characters to really get much out of it.
The secret to its usefulness isn't really touched upon, but is briefly shown; the end of your skid animation seems to be the equivalent of the neutral position. You can let go of the stick at any point in the dash turnaround away from the ledge to be in neutral while still sliding, giving you movement while using normally-stationary options, such as Jab, Grab, D-Smash, or canceling the skid into a run backward to do it again. This is big for characters who slide a great deal, since they have more flexibility; it looks like Greninja would be a noticeable boost from it, for instance.
I'll probably make a video playing around with that idea. It could be a bigger deal than initially thought.