I don't think that I have relayed my point correctly.
I'm not against the playersexual companions, I am all for it. But I'd like it to be equally presented. However, in this case, Astarion has been presented to be a pansexual, but his story is a testimony to the opposite. It's hard to believe that a person is a bi, when all their past lovers are of any one particular sex. In Astarion's case there is not a single FEMALE anywhere in his story, which implies that he has a strong preference in the matter, and is not really a bi-sexual.
That is the point I'm trying to make, that Larian sold him as a pansexual, when his story is a strong indicator that he really is NOT.