More crew that specializes in different things is that thought that I have. Fighter crews are welcome, and I'm not even sure if Officers would even count as crew (they're commanding a ship, just like your do).
Sorry, I should've been clearer. When I said an officers crew type, I mean junior officers (executive officers, department heads etc). A crew type that would give a small overall boost to the crew perhaps only in a few areas. The purpose of this, such as I've given any thought to it at all, would be to offset some of the overall experience loss moving from a smaller vessel to a larger one, reducing the number of regular crew needed to man a ship (which could be interesting as a smaller crew is unlikely to have the same staying power in terms of damage as a larger one, officers or not) or something in that vein.
This is, of course, based on the presumption that the to-be-implemented officers feature deals with high-ranking officers like fleet quartermasters, captains etc.
The biggest problem with adding in new crew types at all, however, is that I'm struggling to see a need for their inclusion. Yeah, they're interesting but it could very well be that Officers (the to-be-implemented feature) will satisfy all of our desires on this point.