Josie & Cullen are advisers that cannot be kicked, afaik, so that puts them in a different class of romances. It is cool that one of them is bisexual. 
But out of the companion LI, if we end up with: Sera, Dorian & IB being easily dismissable, but Blackwall, Cass, and Solas being essential/ANGST to get rid of them...that will be the exact same pattern in Origins that was upsetting.
Basically in terms of LI, I think the only ones who might bring something new to the table in terms of that "queer optionality shoved to the side" thing are Josie and possibly Dorian. And to be honest, it would bother me if it was just Josie. I really hope Dorian is a Big Deal.
This is all pretty cynical and I don't mean to be too harsh....I'm just tired of certain things, and I'd rather go in assuming that's how its going to be, than get my hopes up and have them dashed.