I wish characters like Sulu, Chekov, Uhura, & Scotty (well Scotty did the best out of them) had more meat to their roles.
But I for one liked when the guest characters roles got reduced. If I am never going to see them again then I can't bring myself to care. So hence my favorite moments were always with the regular characters not the guest ones. And I admit I do have a penchance for the big 3 and their relationship.
I also never cared for the whole yeoman concept either so I am extra glad that was written out.