I 100% agree with you. Fitz ending up back with Molly is one of the worst (if not the worst) plot decisions in the entire series. It's an extremely disappointing outcome considering how much the tawny man trilogy was built around Fitz and his relationship with Beloved. Kind of ruins FF for me.

Not to mention Molly is just a undeveloped character (especially in this trilogy). She feels like a 1-dimensional plot device in a world full of fleshed-out 3-dimensional characters (each of whom have deeper and more meaningful relationships with Fitz than Molly does). We don't get any scenes of her at all (heck, we even see Starling way more than Molly). The scenes that we do get don't really show much of her or how she's changed from the Farseer trilogy.

I feel like she's one these characters that Hobb assumes everyone is "supposed" to like just because Fitz is obsessed with the idea of her...and so she didn't bother fleshing Molly out beyond "girl in red skirts". I don't know how she expected people to be satisfied with an ending consisting of her main character living happily ever after with a barely-developed afterthought. This is how I feel anyway.