Right, all of that uses one meter. Just like Andy's Zaineken. You can punish it with meter-based moves or supers, but it has to be on-point and you have to react to it immediately.
Yes, but unless you have precise reaction or you put your opponent is specific situations and you have the timing for the 2nd input right, you will end up not hitting the opponent with the tip. Leading to a huge damage and not need to use an EX or Super.
I wish that no matter the situation it was always safe, of course only if the first hit doesn't "HIT", just the Slide hits. If the aerial kick hits, then the slide will be unsafe. I don't expect it to be super safe, at least as safe as Andy elbow hit, which can be punished with certain normals, but depends the character.