Box Fill
Box Fill
If using nail-on 'Switch boxes' you would exceed box fill. Doing a feed-in/feed-out for two circuits where the top is one circuit and the bottom is another throughout the kitchen is a cool though but using nail-on 'Switch boxes' you would exceed box fill.
Total equivalent count of 11 conductors( 4 Black,4 White, all EGC as 1 and 2 for the device)
11* 2.25 = 24.75 cubic inches. Standard deep Nail-on box either 20 or 22.
So I guess a 4x4x2 1/8 with a plaster ring would do it
Personally I like the thought.
Now getting the builder to pay for it that's something else. On the other hand might be worth watching the inspector initially freak out.