Really? Your argument for having a grab beaten out is "do the grab farther away?" Lol. I guess you don't play people who can wait and then punish things on reaction? I can easily just Jump towards you, wait for something, and if nothing happens, dj away and repeat the process. If you're trying to grab, I am in no danger, and then you run out of stage while trying to mindgame me, and THEN you get *****.
Specially against Yoshi... Jumping towards you and then DJ away/for an FF aerial on reaction is REALLY easy, seriously there is a stupid lag right after Yoshi Pivot that ISN'T hard at ALL to punish. Wario is still able to punish Olimar's Pivot Grab by doing the same thing, and he's got more OoS options, further range and less lag on it. Wario only need one thing to "don't get grabbed" on this matchup... Don't get predictable and bait a lot wrong eggs and pivots for a good dair punish + grab.
Well, good Yoshi's won't really spam Pivots, honestly their game would rely on throwing eggs, waiting for a frustrated approach attempt from Wario and punish (Praying for not getting powershielded). As said before, FD is a must ban, and we should do fine in most other stages. I'd say 55:45 or 60:40, his aerials won't be a great problem for Wario, specially on the ground you can shield and OoS almost anything (except Nair > Jab which is fast but there is nothing a powershield can't do) if you shield his Bir, Bair him OoS and then repeat the "get through eggs, bait a laggy move" process before any move you hit him.
Fair here works fine too, and Nair on close combat is better then any of his options.
Stuff to watchout:
USmash if fresh will kil you, it's got heavy armor and will kill you if you get predictable on Dair approaches.
Uair, remember this, it's Yoshi's main kill move, its not fast, got a little priority, but its got a good knockback, enough too kill you at 140% if you are in the Air.
Nair, It's fast, the hitbox is long enough to punish stuff, links with jab and, if it's not stale is killing you at 160%(?) 150%.
UpB, annoying eggs, watchout for them out of stage, they make you drop off from the bike
Pivot Grab, you are Wario, you should get 0 grabs on EVERY match.
FSmash, it's laggy, easily powershielded, got range and very predictable. You never know... Sometimes people get hit by Snakes FSmash.
Spotdodge, seriously, PUNISH this with nair or bite, its a bit hard to punish this with FSmash or any other moves... it really fast
overall: 55:45/60:40 Wario.