Overall design looks great. I would keep the two side pockets.
I like the concept of the top pocket but personally would like a lower profile pocket up there, maybe stretch material.
I dont use binos so take my input with a grain of salt, but if I DID carry binos I'd probably want them somewhere I don't have to take my pack off to get to them (like on my chest). If I'm taking my backpack off to get to them, and my pack has a horseshoe zip anyway, I'd probably just put them in the main bag. External pockets I like to use for wet layers, gloves, hats and such that I dont want in the main bag getting things wet or muddy.