I agree. For the original comps, it seems like they are all straight. For all the comps in the expansions (with the exception of 1 I think), they all seem to be bi. Why not just flip the gender requirement on the original comps "off". No need to really change dialogue options, etc.
I'm a straight guy, so it's difficult for me to do a romance story line when I'm playing a female toon. Having that option makes it easier, and frankly more fun.
Romance options...
http://swtor.wikia.com/wiki/Romance