Generally speaking, I actually quite like the new layouts you’ve been rolling out. I do have one problem with it though, and yes, it’s the whitespace. It’s not the quantity of whitespace that I have issues with, mind you. It’s the placement. Putting whitespace around something draws my attention to it. Putting whitespace within that something makes me go cross-eyed.
Let me put it this way: In gmail, please give us a “super compact” option!