All-Star Movies is very nice, have you watched the Dis Unplugged video review and vlog on their stay in January?
We stayed there in March on a last minute trip and really enjoyed it. Very clean, well maintained. The rooms are fine, not crazy roomy but big enough. My hubby and I did fine in the double bed, a little more closeness over our Queen, but not uncomfortably so
They do activities for the kids at the pool. Food courts are fine, and you can use any of the food courts or pools of all the All-Stars. We were in Mighty Ducks, so we used All-Star Music bus and food court most of the time - it was a closer walk.
Each All-Star usually has it's own bus vs. Riverside has it's own bus but multiple stops so you're on your way faster at the All-Stars. Riverside is more centrally located, so it's about the same distance to every park except AK. All-Stars are next door to AK, so all other parks a little longer ride, although we didn't think it was that far.