This film is a perfect example of why canon should be dropped because it is strangling the franchise:
First off, they were forced to make the Oriens green rather than being free to make them look like sharks and calling them "Zornian Jewel Creatures From the Fifth Dimension".
Second, Since we never saw Earth cities in TOS, it is canon that they don't exist and forced them to use SanFransisco for every Earth scene. Damn canon!
Third, They were FORCED to give the Klingons head-ridges rather than giving them horns and calling them "Raptullians from Galaxy 33-A, like they wanted to. Damn Canon! It Restricts creativity!
Fourth, They were forced to mention all events that took place before 2266 in Star Trek. That's what evil canon does, it FORCES the writers to mention every detail ever, relevant or not!
Fifth, we didn't see any new locations on the Enterprise because canon is evil.
Sixth, canon murdered my father and raped my mother.