His magnet got slightly nerfed by the removal of b-reverse magnet. You can still start it in the direction opposite of where you are facing, but you can't start it and then b-reverse it after the move comes out like in the last demo. I think Lucas is still better overall in this version due to his new aerials and neutral b, but I really wish they hadn't changed the magnet like this, since it takes away one of his most fun movement tricks, and it seems like they messed it up a little since if you land from an aerial and try to do a reverse down b you just do a pkf some of the time. It just feels unnecessarily clunky and inconsistent now. Hopefully in the next demo this will be fixed, either by reverting to the previous down-b or by smoothing out the mechanics of the newly restricted one. I'd obviously prefer that Lucas retain all of his movement options, but this change might be ok if it can be implemented a little bit better. Lucas still has some of the best aerial mobility in the game, so it's not a huge nerf or anything, but it definitely makes him a little less fun to play.