There's been a necro here, but I feel I might as well respond to this.
You can hold down alt while clicking the green button to get the old "expand until contents fit" maximize. While I agree fully that full screen has little use on a desktop, it's a very, very nice feature on the laptop. I use a 15" MacBook Pro from 2011, and being able to full screen Safari, for example, is a bloody godsend. So much clutter goes away and I am just left with the web and a tiny, tiny bar at the top. It's awesome.
Nobody is forcing you to use full screen. If you don't like full screen, just don't click the maximize button unless you're holding down alt. Simple.
Nice - I didn't know about holding alt and hitting green. Useful feature on a laptop.