Agreed. Talking about the approach to ME's romances helps us determine how they might proceed in DAI, cause I guarantee the DAI devs took a good look at how ME3 romances were done.
But were they done well?
I romanced Kaidan too, but his arc was almost entirely accidental. It just turned into this slow-burn romance that finally flames out at the very end.
But I've heard plenty criticism of Steve's arc (it doesn't work well for at least some people with his condensed grieving-widow plot), heavy criticism of Samantha (from people whose opinions I highly trust and respect), and tons of criticism of the way a lot of the other characters were handled (especially for female Shepard, as indicated here in this thread).
So unless they're setting their sights on a game full of Liaras, I'm not sure they're going to be better served looking at ME3 than Origins or DA2. Certainly, I expect them to improve on the things they've done in the past, not things that other teams did.