I have used the Feedback function to complain, and they fixed the spacing a bit from beta to release.
I can "fix" the windows version by turning off a lot of the "Today screen" and superfluous information bars everywhere. To make it look more like the old Mac version.
1) The dial pad is one of the only things still in a separate window, which is a pain when entering conference call passwords (which is what I use Skype for half of the time). Before you could just click in the call window and start hitting numbers.
2) I can no longer have two different chats open side by side.
Aesthetically I actually don't mind it. It's the huge step backwards in UX that I hate.
I can "fix" the windows version by turning off a lot of the "Today screen" and superfluous information bars everywhere. To make it look more like the old Mac version.