Wavebouncing (and not just neutral B reversal, which was also in Melee, iirc) is also an important thing for your character in particular. Not as much now, but still.
Which character are you referring to? I don't know about P:M, but I thought the only character that really benefited from wavebouncing was
Lucas since he drifts back so much during PK Fire.
Also, when you say "neutral B reversal," do you mean turning around before using neutral B (turnaround-B)? B-reversing refers to turning around during a special attack and changing your momentum, so it's not quite the same as a turnaround-B. I'm not trying to be nit-picky, but I could see B-reversing being a legit tactic for some characters (i.e. Ike/Falcon/Ganon using B-reversal side+Bs during the running animation [outside of dash-dance range], Falco mixing up short-hop B-reversed lasers with turnaround lasers, Sheik/DK mixing up B-reverse needles/punch with turnaround needles/punch, etc.), so differentiating between the two could become important.
Wait why would you have tap jump on for spacies and jigglypuff.
Tap-jump for spacies (especially Falco) makes shine -> BAir much easier/faster, since you don't have to jump and attack with the same finger (Y/X -> C-stick/A is slower than up [jump] -> C-stick/A). I don't know why you'd want it with Puff though.