I gave him a try recently. By far the biggest change I noticed to Levi himself was the change to his demise. Getting 6 health back at most is challenging. The changes to channel but getting 6 stat on melee feels more like a side grade. The reduced aura is whatever. It did come up, but I lost out on a single point of healing, not game changing. The built in suit change isn't bad, if you really need to pack in damage you need a couple soul stones like other beaters, but going for the killing blow to get an abom feels better now.
Necropunks are still fine, but you can only support 1 now, and need to pay more attention to hand management.
Scavengers are different but still good. They're better at self support now, only needing a 5 to get focus + whatever else you want and still having 2 ap. It's kind of nice to pick other triggers besides burn out now.