I deplore the general state mid-rise hotel architecture (it's been almost entirely awful since the takeover of modernism, post-WWII), so I'm not too happy at the idea of these things popping up all over WDW property.
The innate problem to a themed mid-rise is that hotel/residential buildings from early/pre-20th Century time periods typically being portrayed (such as Old Mexico (Coronado), Caribbean (CBR), Italianate (in the case of Four Seasons), etc.) rarely, if ever got into double digit stories. Historically-tall(mid-rise or high-rise) hotels came in the late 19th/early 20th in major cities of America (European urban hotels were still lower rise for the most part). Ironically, the one themed hotel where Disney could have created something that echoed the lost class & beauty of Jazz Age mid-rise hotels, they hired Graves who created a post-modernist eyesore (DLP's Hotel New York).
So when you build a 15-story block tower with a period roof and some ornamental dressing, you end up with big tacky slabs, like the Guest Wings of Las Vegas' Paris or Caesar's Palace hotels. For most of its history WDW designers & operators understood this, which is why all Disney hotels were relatively low (saving the Contemporary). Depressing to see the new hotels follow all the outside operators that litter Orlando & WDW (and every place in the world) with more standard, everyday mid-rise slabs.
The moderates have never been architectural masterpieces of themed design. But their low stature allowed the miracle of nature to help frame and beautify them, and thus provide a modicum of escapism. Adding big central hotel mid-rises will make them feel a lot less transporting and authentic to the period. I also worry about the sight-lines from within EPCOT or on the Safari.