CORNBRINGER
Don't listen to any of us about suggestions to what you should do, just keep it the way you want, but obviously, under logic and good reasons at that! Don't make a total nonsense fanfic, follow along with the world rules and making the plot itself be fulfilled with logic! Other than that, keep going! The fic is amazing... (I just have to point out that you're going too quick, slow down your pace, no need to rush things up)
What, that's a horrible reason to pick Sansa! You're literally admitting that you're Deus Ex Machina'ing who he ends up with JUST so it wouldn't take too long to introduce into the story, that's so lazy holy ****! You could have tried to slowly introduce an OC, or get someone more interesting than a bloody Dead Fish like Sansa whose only dream was to be a proper wife to a prince. Honestly, how dull can a girl be. Get like Arianne from Dorne and write an Arc about shenanigans there, or how he slowly steals the heart of Margeary during some tourneys or something. After which you could write about the drama during the way of 3 kings. ANYTHING BUT; Here's your future wife, k you're married now, cya!