This is very specific, so I didn't want it to get lost in the long general thread.
Two things baffled me:
1.The seeming acceptance of the necessity of selling Downton House, the London mansion. Why couldn't they simply rent it out for a few years - apparently a time-honored solution since at least the 18th century, as we see in Austen?
2.Lord/Lady Grantham moving to the dower house. Why? I could understand it if Lady Mary were solidly married and Lord Grantham were were doddering, but that wasn't the case. Surely no one in their right minds would think that Lady Mary would be happier left alone with no adult except servants?
These both entirely baffle me. Sensible, to you? To me, illogical and bad plotting.