This whole more movesets per character and weapon system could go very wrong or could go pretty good.
When I saw weapon in Mk4 first I was like "wtf is this shit", and it turned out that it was a comedy. And throwable objects, lol... for a minigame okay, but honestly guys...
The stance changes could be very good to eliminate those bad matchups make the game not to rely that heavily on them, but if it is not tested it could go so very wrong that the game won't worth a penny. If all the characters have all types of moves that would give so much depth to the game, even after years there would be new things to discover.
However I can go with one moveset if it is perfected so much that we don't need pocket characters, still that two stances thing can be good if NRS manages it right.
And the two X-rays would be cool, very cool. Not only becaue with time you get bored with one, but if you can chose for example between an attack type
X-ray wich gives you unbreakable damage and an X-Ray that changes your characters ability now that would be dope. For example Noob could call a shadow to fight alongside with him, opens a full new list of combos, however it would wear off with time. Or for some character it would make some moves connect wich normally won't (For example SSFIV Juri). And here we could implement the weapon system as well for some characters. Raiden Hammer Time, yes-yes. So you could use the X-ray as a panic button (like I do it right now) and as a combo tool, or you can have some advantage that will only work if you have the skill to use it, but if you can you could have a clear advantage.