Honestly, I'm not convinced they will implement them. I still think it might be misdirection, purely because I think it would be difficult to properly implement fairly and balanced.
I think it's going to be implemented, but not to the extent that a lot of us were originally thinking. Like Eluvianix was saying way earlier, it's probably only going to be a few LI that have restrictions. My thoughts are that it'll be the bisexual LI, and they'll have complimentary preferences.
So, like, Cullen likes elves and humans, and the Iron Bull likes qunari and dwarves.
However, I could easily see the human Inquisitors getting a few extra LI. Like, of the female characters, there are three left and they are all human. Thus, I could something like this happening:
Cassandra likes humans and dwarves, and Scribbles likes elves, qunari, and humans.
Leading to an inequality in LI choices.