Rani's route is better because it makes vastly more sense for Rin to crash the lunch date with no survivors. Also Rani is cute.
Extra Rin is just worse Rin, but that's still better than the absolute waste of time that Rani is.
Monji Gatou is the GOAT.He managed to subdue the berserk Arc to his will and he is very cool in CCC.It will be a shame if he will be cut out in remake.
Now that I think about it I want him to appear in Tsuki remake too.