Quick opinion:
Awesome, very nice work thus far! I dig the theme to make him unique from Marth yet not as gimp as in Melee.
That said, please don't feel that the theme needs to be stuck to for every single attack, and in particular, I really don't like what it does to the DTilt. Roy's DTilt is so iconic and such an important part of his combo game, that the tipper version sliding people toward you throws off the combo game as well as looking really, well, lame. I would much rather it work like in Melee and either be consistent across the whole blade or be weaker at the tip but still send them always upwards.
Its like the difference between Mario and Doc's UTilt in Melee. They both did roughly the same thing, except Doc's could send you to the side sometimes whereas Mario's sent you straight up 100% of the time. This is one of the few ways that Mario could be better than Doc, in that his reliable UTilt could always be depended upon for combo juggling, whereas Doc's could sometimes mess you up by sending them to the side when you didn't want to, and in the heat of battle it was difficult to make sure you got the right hit you wanted with Doc.
By the same token, Roy's combo game would be much better served be a consistent response, even if it is weaker at the tip, than what it does now for the DTilt. Hitting with the tip of a DTilt for a small pop-up into a combo was a primary tactic of my friend's Roy game.