Very true. I'm hoping for something like the non-companion romances that Troopers and (I think) Agents get now.
I've been thinking about this and I don't believe the Makeb "romances" can be as in depth as the non-companion ones in game now.
From what I understand, none of the Makeb content is class and character exclusive...so all dialog choices will come down to a roll for up to 4 people in a group. The non-companion romances used in your example had dialog exclusive to an instance and the owner of it. It would be kind of odd if four players were romancing the same NPC over the course of Makeb's story.
So, it has to be like some of the shared flirt opportunities we have now with random NPCs and will be subject to a roll if you are in a group, which aren't deep at all.