Is this in reference to LMDE?
It's derived from Debian Testing, their version of Gnome is Testing's version; since Testing is essentially a repo, and not a distro per se, Debian doesn't make any alterations to the "stock" programs contained there. No one at Mint is trying to "make another Ubuntu" with LMDE, especially seeing as one of the selling points of the Debian Edition is that it *doesn't* have an Ubuntu base. Once Gnome 3 entered Testing, LMDE inherited it. It *is* Gnome.
There are a variety of Gnome Shell Extensions available to customize and add functionality to Gnome 3, including one to restore "Shutdown" to the System Menu where it belongs. Since LMDE users are going to modify their installs anyways, given the rolling nature of the Testing repo, I'd say most of your criticisms, valid though some may be, are better directed at the Gnome developers themselves, as it's their changes that will be adopted into Debian as they are released. Clem and the team have done a great job providing a rolling yet stable platform, especially since they went to the Update Pack model; expecting them to provide a plethora of extensions like they did in Mint 12 is a bit much for a distro targeted at more seasoned users that's rolling.
Gnome 3 is what it is, love it or loathe it. Check out the available extensions and see if you have a better experience; if not, you may have to move one.
GIGABYTE GA-P35-DS3L LGA 775, Xeon 3.0 Ghz Core 2 Duo, 4 GB DDR2-800, EVGA 8800GT, WD Caviar 250 GB SATA-2
Ubuntu 12.04 LTS, Crunchbang Waldorf, Mint 13 w/Cinnamon, Elementary Luna Beta, Puppy