Congratulations! BCV and BLT will be perfect locations for your family being so close to the parks while kids are young, and the BLT refurb seems really great. I think the BCV refurb they just had is very nice, too.
I know your decision is made, but I just want to echo what BrianNoble said about sharing rooms with the kids and how things change. You're in the early years where time seems infinite of high chairs and playpens and diaper bags and hourly snacks. It really does change in such a crazy way once the kids hit school and the calendar you're tied to, whether it's vacations or sports or band or cheer competitions, etc.
For us, the room layout makes a BIG difference to us, and it depends on what room category you're using. As a family, we don't do studios -- 1B is the minimum, and that takes points. We like to take extended family with us peak weeks (Thanksgiving, 2025 Riviera,) and the 2B there is gorgeous -- have stayed there before and own/love it.
We plan to pass our DVC on to our kids since we had them late in life, and they can either sell or rent for a profit once we're gone or keep it and use it for themselves into their middle age, but before we're dust in the wind -- and after retirement -- we plan to do a little snowbirding in January, and the new Duo Studio at the Poly tower is fabulous! I just toured it this weekend, and it's SO well laid out. I don't plan on cooking in retirement, LOL, and walkability to so many dining options is great.
DH HATES AK styling with a passion, but I love it. I just got back from a long weekend with our 12YO son and LOVED the balcony looking at the animals, the FOOD everywhere was wonderful, at every level, pool, hot tub, and the buses were AMAZINGLY quick and always pulling up to the station when we needed them. IDK if we just got lucky or what, but we haven't done buses, really, in about five years since buying at Riviera (Epcot/HS are our favorites, so we're very pro Skyliner,) but the buses have come a long way. No hesitation on those.
I'm glad you bought places that speak to you. I know SAP makes sense for a lot of folks who have to book at 7 months/don't mind split stays, and I actually really like the SS studios and resort, but I want the 11-month booking window at Riviera, and now Poly Tower.
Welcome home, and wait until your kids are old enough to have opinions on where they want to stay! It's fun to explore. Our AK son trip was so nice to do, him and I. I have our first couple's trip this Valentine's Day weekend with DH (after 13 years of marriage!) and a girls trip with our daughter in May at RR/GF -- she's bougie like her parents, LOL. I hope you have such a great experience!