I think it depends on your kids and your style of vacationing.
The ease of access to MK is definitely a major Pro. My kids also enjoyed the Poly pool. I did not like the different buildings because we were there in a rainy period and had to contend with that to get to transportation or food/entertainment.
We also loved AKL. They have many fun activities for the kids and it's a beautiful place. The food options are also varied. However, you could walk or monorail to experience other restaurants near Poly.
It is annoying to fold up the stroller on the bus, but for us it's not a game changer. If you expect it, then you just prepare for it. I really think it depends on the parks you plan to visit and the amount of time you plan to stay at your resort.