The standard view and guaranteed Boardwalk view options at the BWV are a huge advantage - IMHO, it more than makes up for SAB (we're not pool people and if you have small ones, it's a lot easier to keep an eye on them at the BWV pool than it is at SAB).
We always stay at the BWV and often eat at the restaurants at the BC/YC as well as those at the Swan & Dolphin (love that 20%
DVC discount at the Swan/Dolphin). IMHO, the EPCOT resorts have lots of wonderful restaurant/eating options - the lake isn't that big. No need to restrict mealtimes to your own resort if you don't want to, no matter which of the 3 complexes you choose to sleep in, LOL.
IMHO, the location of the BCV and the BWV are comparable. We prefer the BWV location because it is only a little farther walk to EPCOT (than it is from the BCV) and it is a lot closer to MGM. We love the ability to walk to both. The boat is nice, but walking is faster.
I agree with Blue&Gold about the BWV hallways - what's a few extra steps when you are at WDW? Especially since the extra walking is in air conditioned hallways and the rooms with the better views (IMHO) are farther from the elevators.
All that said, IMHO, you can't go wrong with either one! My advice is to choose the theme that appeals to you most!
Best wishes -