A thought: Has anyone checked to see if the current companion voice actors have done more work for BioWare? I mean, adding SGR must take a lot f redone lines and flirts, their should be a record of it somewhere.
I don't know where it would be documented separately. Usually, actors are credited with a recurring role for the full span of their involvement with a particular project, as 2010–present (or whenever they began voice work on SWTOR). Even if we could track it down, it would only indicate that more companion dialog was being voiced, and not specifically related to same-gender romance.