Mario's Up-B is fine as-is.
Mario is also more top-tier in PM than any other melee-origins character.
Get@me
Lucas and Ness recoveries are fine as they are too.
Including the tether, but Up-B tethers could use a little bump.
Just feels bad
I don't like playing Ivy or Oli just because if I ever have to recover it's like...
Auto-bad-feelz
Edit: Will elaborate here
By bad-feelz, I mean, even if I have a free get-to-stage card, after edgeguarding an opponent or something.
Recovering with them is un-fun, not engaging, dull, not interactive, un-interesting.
Like... if Oli's neutral B was bigger and cooler, or Ivy's D-air worked for it better, or something, anything, then it would be less not-cool.
But their recoveries are bottom-tier when it comes to 'cool' and I play this game because of cool stuff.
Ivy/Oli off-stage = not a part of the game I want to bother with.