It's okay on the kitchen to go sidewise under the window and then go up. Just use waste fitting below the flood level.
Much better then an AAV.
An AAV needs to have constant air to it, and be accessible.
The drawing looks nice.
I like to use more 45's in my layouts, but what you have will work too.
California may let you wet vent the upstairs lav over the upstairs toilet too.
And wet vent the downstairs lav over the downstairs shower vent.
But the way you have it drawn will pass inspection anywhere.