I was less pleased with ME3 since after Kaidan and I admitted our feelings for one another, the a$$ basically waited until the end of the world to come visit me in my quarters
I feel like I played the whole game (and indeed the whole series) with loads of UST 
I felt like it was pretty obvious Kaidan and Shepard were regularly having sex throughout the story (even more so when Citadel is taken into account), and the sex scene was just pushed to the end to give a nice romantic goodbye to the romance before everything went to hell. I thought it was well placed, for the context. The same wouldn't have worked in DA2 because Hawke didn't know anything was going to happen when she/he woke up that day, so goodbye sex might have spoiled the ending twist. But it would have worked in DAO - instead of having to gag and make retching noises through Alistair and Morrigan's sex scene before marching against the archdemon in DAO, I'd really have appreciated a proper goodbye scene to my romance there.
Similarly, I really hope that if we come to a clear last battle in Inquisition, Cullen can get a "goodbye" scene like Kaidan's. I don't wanna just up and leave him behind.
But! That's neither here nor there. Seeing as we're back to kissing and hitting it whenever we want and Liz mentioned her regular woo breaks, it looks like we don't have to worry about the first love scene coming too early/too late or there not being enough of it this time around. If we don't get a proper goodbye, at least we'll have the option to throw Cullen in bed and make our own goodbye at will.