You know the writers are gonna separate the Inquisitor from his love interest in the next game. You know it, I know it, and they know it.
But in case you don't, even though I'm sure most of you immediately know what I'm talking about, Bioware just can't seem to have a happy ending for the hero and his love in their games. Revan, need I say more? Shepard, The Warden, Hawke. Hell, as I beat DA:I and shared a touching moment with Cassandra, there were lines spoken that pretty much set up their inevitable separation. No she wasn't named Divine by the way.
Unfortunately, Bioware's track record when it comes to romances seem to be very much the same. The Hero enjoys a bit of respite with his love, before they are separated by circumstance. It's gonna happen with The Inquisitor.
That being the case, and while I will certainly never abandon my criticism of the writing for the end of ME3, Bioware also now has a fairly solid record of either giving the players closure or creating the opportunity for such closure.
Mass Effect - As weak and just headshaking as much of the ending was, there is still a fair indication that Shep survived and that he/she and the LI were able to eventually fly off into the sunsets.
Dragon Age: O - While I never romanced anyone other than Morrigan, in at least this vein Inquisition gave some absolutely heart-warming closure to the relationship and even built the separation into it in a convincing manner. I can't speak for Leliana, Alistair etc. romancers though.
Dragon Age 2 - I really wasn't too invested in my Hawke-Merrill romance, but Inquisition again gave some very nice nods to it and gave clear indication it was ongoing. It was only for this reason I had Loghain stay and fight in the Fade, as I don't even want to imagine what a heartbroken Merrill could do.
Inquisition - Yet to be seen.
So I have to agree with you that Bioware's writing has for the most part lacked either the creativity or the bravery to allow the protagonist and their LI to enjoy their happiness together, but with the exception of the Solas romancers, Bioware MIGHT use some of the DLC to do just that, especially if the next games aren't going to focus on the Inquisitor.
Why? Bioware as an entity can and does makes bad decisions, bad moves, and so on. However, Bioware has never ignored the importance of the relationships they allows players to create and explore in their games. Even the ending of ME3, for all my hatred of it, I can totally understand from a narrative standpoint. Why did it hurt so badly? Because we absolutely loved those characters, and to see them not only separated but possibly separated, isolated, and in some cases killed tore at our collective hearts in a way very very very few games have dared to try let alone achieve. And I am certain to my core that no one at Bioware was unaware of the emotional response they were courting.
This gives me faith in saying that even if the Inquisitor and the LI (in my case, eternally Cassandra) are separated, unless Bioware does something totally uncharacteristic, eventually that relationship will be a happily ever after type....even for the Solas romancers.