Hopefully they'll be something cool in the remake of 4. Like 3's ability to see the storyline as a girl. I'm not going through it again just to see some more personas.
Edit: I see they just added some more characters, everything beyond that gets a big MEH. Another female is just a another girl for brotag to spend 'Christmas eve' with.

That fighting game needs some Persona 1 & 2 characters to be truly cool.