I didn't actually mind them. There were various styles officers and crew could choose from, exactly who got to wear what colour was a little confusing, but all-in-all I think they were alright.
Love them! Very much!
From some early memos I saw, the idea was that the ranked crew could essentially choose their colours: ie. beige or blue/grey, with the division colours being shown by the round colour patch behind the insignia and the epaulets on some of the variations' shoulders. There are wardrobe shots of Decker and Chapel in beige, and other shots where they are in blue/grey. And we have the Rhaandarite ensign in blue/grey, even though many people higher in rank are in beige.
I always imagined Andorian officers would be more likely to choose a beige uniform, rather than blending in with the bluish fabric.
TMP by
Therin of Andor, on Flickr
I also saw a memo that explained that the green version of the uniform was for starbase personnel, the brown for enlisted, and the white uniforms tended to be specialist tunics (medical, security, engineering outfits). Also mentioned was how crew could add personalized touches, eg. Spock's black collar (partly to protect Nimoy's "hero" uniform from makeup stains), Ilia's leisure robe with a unique "Deltan collar" (Saavik's version in ST II omitted the collar), the native Americans with their feathers and beaded braids, etc. Later, in TNG, this idea was continued with Worf's sash and Ro's earring.
I think, if TMP had spun off into a TV series, telemovies or a direct theatrical sequel, using the same uniforms, we'd have seen more of the personalizing of uniforms.
The rest I could dismiss as styles always being recycled in some measure or other.
