LOL this is actually a REALLY big deal. It can obviously be played around but it is a considerable weakness.
I also don't believe he has had this issue in previous games (at least not Brawl). He can't do a turn around Up b (similar to how samus in brawl couldn't b-reverse), so if you are trying to recover and are facing the wrong direction, there is no way to snap the ledge unless you do a side B, (or reverse fire breath but LOL lag).
You can GRAB the ledge after the animation is basically over and you fall past the ledge, but you can't snap it early, which means anyone has the ability to spike you, or bair stage spike you, if you are gong for the ledge.
LOL at the OP having to explain it a bunch, i feel your pain.
I do think that being able to klaw to turn yourself around, does at least help this a little bit, in most recovery situations you have time to turn yourself around pre-emptively. Edge guarding with fairs, is the main issue, but I would simply say doesn't use your DJ and then you should be able to DJ Klaw the other direction, then up b. If you're edge guarding with fairs, you shouldn't be at risk to getting gimped yourself.