I always liked the "Cage" color scheme, but retroactively I've always thought that in-universe the latter TOS era colors may've been an attempt to brighten things up for spacegoers - space is dark and you're on the ship all the time, so let's have something bright and colorful and less dreary to stare at.
This was a real concern after Skylab. Everything was in golden brown hues, and by the 3rd Crew, everyone was sick to death of it.
I don't know what they've done with the I.S.S. to improve on that.
As for Spock's hand-gesture controlled slides, if the lady was cropped out of the shot, she was never there.
That's what editing is for.