Texas Barbie, I'm having the same thoughts. We were actually booked at WL for December but decided we'd give BC a try this year, given the impending construction. Now I'll be the first to admit, this may have been "alarmist" of me, particularly given that we were at the main lodge and not the villas. It's quite possible (even probable) that the construction would not have disrupted us at all, but to me, eliminating the worry was worth the switch. I didn't want to spend the rest of the time between now and our trip thinking and worrying about it. Plus, we've always wanted to try BC.
I'd suggest that if you're concerned enough that you'd be second-guessing your decision, maybe save the VWL for another trip and stay somewhere else you've dreamed of trying or already love! Or, give it a go! It's like my husband said to me- we'd still be in Disney, how bad could it be?