I think AKL sounds just lovely, even with the transportation limitations.
I'm planning to take my mom in the spring, for Flower&Garden, to celebrate her retirement and birthday (as well as give me a much needed break) and I'm looking HARD and AKL. Depending on the promos, this resort is not much more than a moderate and offers a ton of activities. My mom is not a big drinker, loves food but doesn't eat much, isn't interested in pools and this resort sounds like it will be immersive.
Here is an activities list from last year-tons of stuff to do!
http://www.aklresort.com/content/2011-september-activities-guide?size=_original
There is also the Sunrise and Wanyama Safaris for guests. I would LOVE to do the Wanyama. Since dinner is served family style for your group, we'd be able to sample a bunch of the goodies from Jiko!
I've read both sides about the transportation and I think for us, who will usually do parks in the morning, it will be acceptable. We'll spend a fair share of our evenings enjoying the resort. Plenty of people who have stayed there didn't find the transportation that much different from any other resort. I think the fact that AKL/Kidani don't share buses with other resorts helps.
I think AKL would be a great choice when you allow yourself time to take advantage of the programs offered. If parks are the focus, I'd choose one of the monorail or Epcot resorts.