The only problem is, indeed, Ramandu's daughter. But does she actually contribute anything to the story? Please don't kill me, but I think she could also be left out. It would be weird if the romance made it into the movie, because of Susan and because it's such a weird part in the book. Like: oh, stargirl. Well, I guess I'm in love. I'll marry her. At least Caspian knew Susan longer than a few seconds.
Are you kidding? RD has a huge part in our script. Especially the swordfight, karate chops, "Matrix-Like" moves, and putting Caspian in a headlock until he agrees to marry her!! OOPS! I'm giving away the script already!