I love the BC, especially for the lovely stroll to Epcot. Poly was nice, but if I'm spending for Deluxe, BC is my choice. That said - in the interest of going more often (aka saving money), I tried POFQ this year and really loved it. I would happily stay there any time.
I'm not a pool person, so that wasn't a factor. I had my qualms about the "exterior corridors," but ended up perfectly comfortable with them. I'm more of a "Theme Park Commando," so I don't really need the deluxe amenities for my vacation style.
The main thing I missed about BC was the location, the walk to Epcot, the boat to DHS, and the convenience of going back to the resort during the day when at Epcot or DHS.
POFQ is pretty and charming, there was a room refurb in recent years, and my room was nice, clean and comfy. It is small and compact, which is why I chose it among the mods. One thing I really preferred about POFQ was having the food court for breakfast. When I stayed at BC in 2012, the BC Marketplace had very limited breakfast options; I ended up eating breakfast at the Captain's Grille at YC 3 out of 4 mornings that trip. POFQ has a wide variety of hot and cold breakfast selections, including Mickey waffles!
The point of this novel is, I had my doubts about going from deluxe to mod but ended up being very happy with my choice.