1. I don't think SCP has yet pumped music.tbl limitations. We're using he max number of music tracks allowed in the retail FS2. If the limits have been upped, we'll look into it.
2. We voted on this internally few months back and decided to stay with the original style. So no Crusade or Legend of the Rangers style jump effects.
3. I think here were some limits as well, so we might have already hit the limit. If we can add more comm anims, we'll look into it. Keep in mind that comm anims are captures from the shows and movies, and if there are none for someone, I doubt we'll animate one ourselves.
Seriously though, are you even using the current music and comm anims to their fullest?