I have seen some of your posts in other threads about the CL decision, but I will reply here.
I know WL has a huge cult following for the Old Faithful Club and the offerings really do sound great! I have stayed at WL the least of the MK resorts and it is mainly because of the ease of transportation. I would have 100% said go for it until I saw you mention someone on an ECV in your party. My mom uses one for long distances in the parks and there is nothing better than the monorail for the ECV (besides a walking path). The busses are ok when there is space, but she flat out refuses to attempt it on a boat. That would personally be my biggest factor when weighing the two resorts. On the flip side, you could use some of the savings and call for accessible Minnie Vans. You don't get the Lyft app promos or anything with them, but you can charge them to your room and pay off with gift cards. If you're interested in that service, the number is (407) 828-3500, option 1 and you should call at least 45 minutes before you want to get picked up. I always use it at AK and call about an hour before we want to leave.