my question is why do you want to eat this? Would you eat this many bananas in one sitting if they weren't frozen and pulverized? When you change the cellular structure of a food (blended versus whole) you most certainly change how the nutrients are delivered to your cells and the manner of blood glucose and insulin spike or rise.
You're going to experience a rise in glucose (and therefore insulin) by eating a lot of bananas. Question is, will they spike and take forever to fall, or will they provide a slower rise, yet still reach a high apex before recovering.
Just because there is no sugar or no dairy doesn't mean that this is truly Paleo.