Hmmm. I have split feelings on this one. It does look like HGTV went hog wild and these people pulled every style out of the pottery barn/ballard designs playbook for their renovation. but at least they are calling it a renovation and not a restoration. Personally, I have no love of houses built after WWII. I think style went right out the window with a substantial amount of quality as well. That said, I do think they deserve some credit for making their house the place they want it to be. Everything looks well done.
We all have our reservations for what is appropriate and what is not in reno/resto/repair of old houses. How far you are willing to go and how much of a purist you are is subjective. For instance, As each room we do gets done, I am building new doorframes with functional transom windows. They were not here to begin with, but are a feature I have always loved and wanted in my home. Not to sound full of myself, but they are done so well and in such a traditional manner that 99.5% of people would never think they were anything but original. Yet I'm sure there are people who would declare that I am destroying the original character of my house. It's a hard line to walk. We are all opinionated here and what is your cup of tea may not be mine. At least we can all agree on one thing. Life looks better through wavy glass.