Re: How many scenes will Pine wear the gold uniform in the next movie?
I don't think Pine had an issue with the gold uniform. JJ decided from an artistic perspective that he wanted to wait until then end of the film for Pine to wear the uniform. I'm sure in the next movie he will be wearing the standard uniform for most of it.
I believe that you are correct and that we will see Pine in the classic gold for most of the next films. Eventually a few films down the road when the new cast has matured some and mostly in their 30's bring back a sophisticated new version of that green command shirt Kirk wore in the later episodes of TOS, exactly like what was stated on this thread earlier!
It is our destiny to explore the stars...