Not sure if this is the right place to put this but....
Currently as far as I can tel lthe only place to change outfits is visiting a tailor npc on a station. I would love to see an option to change which costume is being worn on the fly I don't mean to modify them just to choose which one is worn.
With thre outfit slots it'd be really nice to chose which one is worn any time. Going on shore leave pop on the off duty costume. Maybe you have a dressy uniform for diplomatic ops that you want to put on when doing those.
BTW I just bought the miror universe pack yesterday and I love it! Especially as it shows off my trill captain's spots!.
Edit: Though most folks would probably prefer the option right from the character screen it could add some nice functionality ot hte captain's quarters in the ship interiors.