They changed him to just using one-handed swords in the PSP version, IIRC. He would be cool as a "bonus" character though if they kept it purely non-canon (or brought in the female protagonist).
I have a love-hate relationship with P4A - I love the characters and most of the moves, and Yukiko is one of my all-time favorites in a fighter.
At the same time, I really disliked the "mash Square to autocombo and hit 1 trigger to DP" aspects and P4A in general is rife with a really ridiculous amount of invincibility frames on too many things. But overall I'm fond of it and eager for more characters.