I support set orientations, species gating (fantasy races are really more like cousin species, just saying), class gating, story decision gating, and generally everything that makes the game feel more real, the setting stronger, allows for better characterization and storytelling, and opens up more total options among the cast. So more specific character preferences really help with that. They also make replays a lot more fun, and DA begs for replays.
I'd love for every reasonably humanoid character to be an option for specific groups of characters, just as long as there's an overall fair pool of options for people's real world genders and orientations. It's supposed to be a principle of this franchise to be inclusive and fair, so spreading the field would help with that. At least I think so. I don't agree with the imbalance by gender and related things this time, but the romance gating itself is definitely good.
edit: Gating by cc sliders I think is too much though. It'd be just way too arbitrary, and it wouldn't really say anything significant about the characters.