Appearances can change, as a character can get a new haircut and have that kept in-character without an issue, and as for more drastic changes, well... player choice. Might be hard to have it in-character, but the game is made for more than just RP'ers.
I think we just might have to at least do more to kickstart or maintain the current community, particularly on the Defiant side in Argent. It just feels a shame that there's too liittle in terms of RP (at least visible) on my side of the fence :<
I have ideas on maybe kick-starting things again, but some of the prominent RP'ers still left are now on holiday, so I'll wait for just a bit more.