I don't know, it just seems to me Bioware doesn't put much if any focus on them. It's more of a fan requested thing that's a second thought to them. Like, they put so much effort into characters building believable relationships between each other why not be like that for LIs?
And that might be a bad example I'm just saying it was something different from what I've seen in a game but it's a very real issue someone would have to tackle if they were in that situation. Especially if your journey was lasting months or years.
I don't think I'd call it fanservice (which is really what it means for something to be added because of fan requests, right?). BW pioneered adding romances to their stories long before fans clamored for it. Fans clamored BECAUSE BW did them. And did them well on the whole. Sure, I feel like they're a bit embarrassed at how much the fans like them, but if they didn't feel there was some value, I think they'd skip 'em.
That being said, the structure of the romances do tend to end in success == sex. But that's hardly a BW-only problem in writing romance in popular fiction. Overall, I think part of what makes them work is that the actual romance budgeted part is small compared to the friendship. The friendship and connection with the followers is what sells the relationships. Something I mentioned in the past few days is how the initial convos with Alistair at Ostagar aren't actually the romance... but it feels like an organic part of your relationship with him. So, overall, I think the romances generally work well, with obvious caveats, specific issues, etcetc.
(and that was probably only partially coherent as it's pumpkin time for me... nighty night!)