Right now I use standard melee controls but with R set to jump. I use L to wavedash/everything else and Z is untouched just whatever shoulder you don't use for shield/wavedash I recommend making jump for otherwise impossible hover stuff. It's seriously like playing without a c-stick.
yeah grab and wavedash oos are both good. Grab is pretty situational cause at high levels of play people are going to be safe on block, so you have to get a perfect shield to really get a grab.
Also I made a quick video about ledge cancelling up-B to get hover back (shoutouts to frozen and DARKcpu0). I MIGHT BE WRONG but I think you can ledge cancel up-B, get hover, and NOT get an up-B back to use again. So pretty easy to mess up if you don't know which ledge cancel you got. I think this is a cool option for getting offstage in hover quickly, but I dunno if you'll see me using it in tournament until like.. 3-4 months from now when I can really utilize it consistently. Right now I'm focusing my lab time on stealing the ledge with up-B without clipping the stage.
https://www.youtube.com/watch?v=uVJVa4GQ_8I
EDIT: So yep talked to frozen. We both think it's the difference between sliding off the stage after up-B, and getting the weird "lucario/wolf" ledge glitch that you might be used to from 3.0 where you just appear next to the ledge. Sliding off naturally means you can up-B again, getting the glitch means no up-B.