When they get in the Oswald ears & merchandise (hopefully will be at Oswald's gas station), then at least the Filling station will look appropriate, merchandise wise.
BVS is nice . . . upset I didn't look closely at the windows a couple weeks ago during the rush to Carsland, but, BVS uses in-ground spotlights on the trees at night, sure didn't have these in the 1930s. At night BVS just looks like an upscale shopping district in modern times. MSUSA was developed a lot longer than BVS as Walt thought about this area for years and years and had the goal of showing people an idealized vision of his childhood. BVS was envisioned as an upscalish-looking shopping district, and as a place for a high priced restaurant . . . not for attractions.
So, I don't really get the "transported to 1930s vibe", especially because BVS is only 2/3 as long as Main Street, and doesn't look as wide, and doesn't have the side streets that Main Street has which really add detail. Plus, BVS doesn't have a train around the park, just a low-capacity trolley.
I think of Carsland as the star, and BVS as just a nice little walk-through area on the way to Carsland, so I'm not devastatingly disappointed I missed the windows, I wish I saw them for sure, it won't impact my enjoyment of Carsland very much.
IMHO, HoneyDukes in Potterland is based on a location described in the novels . . . BVS was just a way to make Sunshine Plaza look more upscale, not primarily to transport guests somewhere else. If they wanted to do that they should have torn it down and built something like a medieval Merlin's village, or an english street from Mary Poppins, or something like that. IMHO.
Walt didn't want a window on Main Street, he wanted Disneyland to be the star . . . turning Walt's personal history into a bizaro-pseudo-historyland recreation of 1930s California, is a little out there, IMHO. Most guests don't get the little references, and some might think it is just a nice little shopping area.
The world J.K. Rowling described in her novels will always be more detailed than anything WDI can come-up with to "retro-fit" DCA 1.0, as Harry Potter has an elaborate backstory everybody knows about.