Ya can't grab ledges while facing away from 'em, but at points during a (certain?) characters' Up-B, you can sweetspot the ledge even when faced away. Particularly useful for the Falconator since when he reverses his Up-B's, his hitbox is a bit harder t' snag for onstage-edge guarding foes if the Falcon player is recovering low.
Are those Melee mechanics? We'll likely get them back if so, and probably with a small nerf.
Release date is literally three weeks from now. The hype calls for a countdown. I'll start 10 days before it, if I can remember.