Congratulations!! Based on all that you've written, I suspect you made the most prudent choice!
You get to go in March on points at poly. You get to save $$ using your
dvc membership discounts (plus totwl and the new Epcot lounge).
I really like poly. I have only stayed at bwv, BLT, akv and poly. On our next trip in early December we are staying in 1bds at our homes (BLT and bwv), then switching to the poly. A bcv 1bd was open but I'm already doing bwv. I preferred going back to poly.
I just like it there. The electric parade. The dole whip. The beach. The energy at the pool. Captain cooks. Trader SAMs. The monorail. I cant wait to go back in December as the last leg of our 3 resort trip over 10 days....
I might want to shoot myself though. Moving 3 times in a trip....