Considering that Skyrim is their best-selling game ever? ... No, Bethesda have not lost touch
with their fanbase.
So now explain how game sales relate to Bethesda catering to the core fans of the franchise.
Crysis 2 sold more than Crysis and they sure as hell didn't keep in touch with the fans that made them what they are.
You might want to visit them more often. Here's the first that comes to mind:
www.gamesas.com/topic/1400789-poll-if-they-were-to-add-build-up-your-own-house-town-into-a-dlc-then-where-would-you-like-it-to-be
Do a search and you'll find more.
I've done a search for house building and it's either mod discussions, discussions for other games or very results coming up that are actually relevant. People ask for Spears, Werebears, Acrobatics/Athletics and Spell Crafting much more than house building.