Unless new specializations are created for this game, no one will ever want to start a new character. That sounds like a recipe for failure to me.
heh people start and have new characters all the time, they list them in sigs and talk about alts. But that doesn't mean a lot, I played EQ for 9 years and change on just 2 mains (2 boxing) and I knew plenty of people that really only paid attention to mains and never took alts out of low levels just using them as crafting mules such.
And you want to be a doctor? use that kit, sci officer use a differen kit, same with boffs. I have medical boffs, sci boffs ,security boffs and so on. I use some soley on awaymissions and others only for ship duties, so we already have that.
So a command Officer would mainly be a Group or Team buffer not a solo skill user like the current classes. Instead of say alpha strike it would give a smaller buff to all. almost like giveing one toon the ability to use all the team skills like Engi fleet and so on. Is this kinda what your thinking.
I really do love this game .... but they should have called it Starfleet Online instead and save us all the grief. I love the Star Trek Universe, but I donít necessarily want to be in Star Fleet (or a Klingon :p). I really want to be a Ferengi mercenary .... of a scruffy looking nerf herder .