I'm actually finding the worldbuilding immensely fulfilling, especially in terms of getting down to character bios and things like that. It stops me before leaping in to ask questions about how the streets smell, what does the cooper down the road look like (or his daughters for that matter), who lives with, near and around the protagonist, who are his friends and what do they do... yes, in terms of writing the story, the world-building is certainly getting in the way of that. But some of the best ideas and aspects for the stories are popping up while I am moving mountains in Fractal Terrains, or conditional formatting in Excel.
For instance, when I stopped and asked myself "what are their units of measurement?" I began researching the 'Roman Mile', and after doing up some nifty distance calculation/conversion formulas in Excel, I found out that an Emissar is expected to be able to march xx amount of miles in a day, and this distance predetermined the definition of a 'league' by their reckoning. Yes, details, details, who cares for such details? Me, and I am finding it immensely fulfilling.
Ehh.. way back when myspace was more popular than Facebook, I joined a writer's group there, and it was dominated by a few unhelpful condescending 'authors' and a slightly larger body of pandering nit-pickers. It has largely deterred me from those sort of faceless interfaces. I prefer friends and family who have given the brief on 'what happens in the study stays in the study'. I have also swapped notes with a few honest co-writers, who aren't afraid to call a spade a spade, and continue to do so when I am actually committing finger to keyboard.
That's a good blurb. I have a strong fascination with fantasy stories where the protagonist isn't always an adventurer, but a common man (or woman) with real problems. Give me a potter trying to survive the local criminal elements beating protection money out of people any day over the adventures of the brave, young farm boy seeking adventures on the back of dragons or on the belly of elvish women. I think that is where the drama is. I think your story sounds like it will pay it's due to the common folk.
It might just be what you need. A bit of fresh air in another world can keen your mind when you return to the old one.