The more I think about it, if you take out “The Rathtars” scene from the film, I almost think it’s as perfect as it could be.
What was wrong with the Rathars? They’re essentially just over-sized Mynocks with tentacles. They’re sure as hell not that much weirder than what we’ve seen before. Heck, just look at the creatures in the Falcon’s holochess;
https://photos-5.dropbox.com/t/2/AAD90GATU03on9mIqHZkbXWQsy8QAcOUT5OIonwPN9Zkyw/12/20535561/png/32x32/1/_/1/2/SW VII BTS holochess Tested (1).png/EOTRsQ8Y-wYgASgB/zi6gj2z84SZEORXVQxC7oPqBfmWN0sm_ArGpMhYeMjQ?size=1024x768&size_mode=3
EDIT: Or are you talking more about the pacing?