We just got back from our first stay at BWV in a 1-BR (purchased via resale). DH was adamant that we would never use the kitchen or in-room laundry, but 1-BR was the only thing available when we booked. You know what? We used the kitchen every single morning for making coffee, DD8 had cereal, frozen waffles, pancakes, I kept cheese and crackers on-hand to have with wine on the deck at night, and I had a couple of frozen pizzas in case anyone was hungry. It was great! Even better was that we came home with ALL CLEAN CLOTHES, even DH did his laundry.
We were total monorail snobs and stayed at the Poly 4 years in a row. We switched to the BW last year when the Poly was starting construction, and we fell in love. Honestly, we didn't miss the monorail at all, but we also didn't have the stroller this year. Point being - you won't always have a stroller.
If you love the Poly, go for it! But definitely consider BLT or other resorts that have committed 2 BR.