(Shrugs) I don't really bother much with romance in DA:I. Very poor this time, though I feel like Bioware's track record isn't great on this in any of their games. They just can't seem to get it right, which considering how much focus the fans put on this is somewhat frustrating. Some games are better than others at this I guess, but mostly I've been disappointed with most of the romances in their games (not that they are any worse at it than basically any other game out there though - its a common problem in RPGs).
The only one I've sort of settled on during my playthroughs was Josephine (always with a female character, as all my characters in DAI have been female - male Inquisitor just doesn't seem to fit the role IMO). But frankly I agree with the OP (on this anyway), that its pretty boring. The lack of a sex scene doesn't bother me, as they are always awkward and look silly anyway, but its more the fact that she constantly seems to revert back to just being my secretary. It seems like I was constantly having to say 'Er... you remember we're together, right?' because it never felt that way really.
As someone who has been hoping for a romance option with a character of more mature years (40 or so) it was deeply irritating that both Cassandra and Vivienne couldn't be romanced (by a female character anyway). Neither could Morrigan or Leliana for reasons I still find utterly unconvincing. So what is some people romance them in earlier games? My characters didn't, so they were single. And the fact that they can be romanced in earlier games somehow meaning that the romance would be exactly the same makes no sense either. Different people react to others in different ways, find other aspects of each others lives and personalities that connect and provide new things for them to bond over.
But it wasn't to be, nor were there really many new characters in terms of NPCs, full stop. Of the ones that are there, I would have liked to be able to romance either Minaeve or Helisma. I wouldn't expect much content from such romances (it would hardly be the first game where romances have little content about them), As with the Josephine romance it wouldn't be very involved, but frankly I liked these 2 more than mostly any other characters in the whole game. Obviously any romance concerning a Tranquil would be a difficult one to write (it would necessarily be 1 sided, and you couldn't have your character forcing themselves on the Tranquil - so I see it more as an employer who is simply content to have the object of their affection around. An unrequited love story if you will, and quite in keeping with classic old class barrier stories etc).