People are going to want to use those new TOS and WOK uniforms after launch. Let's not make them break the bank on it. Cryptic should reset the free first costume change for all player characters and bridge officers.
I would assume all players will get a free Costume change on the 5th, 6th or 7th Feb. UK Release is 5th so giving one out on the 2nd they'll have to give another out again on the 5th (as we are all on same server).
So, unless Cryptic are going to make costume changes free from now til the 7th (I think that's the date for the grace period, for those who have ordered & will get theirs late), then I would expect one Free Costume change on 7th, or individual costume change 'tokens'.
You shouldn't need one, costumes are savable and swappable no? You only have to pay to design a new one. Switching to a preset like the bonus costumes or your fleet costume should be doable on the fly.