I would like to give my 2 cents on this subject. The mint team had really no good option if you think about it (although I personally really like what they did).
They could have:
1. Given stock gnome 3 - Thank goodness that they didn't. Many people would be unhappy with this decision, as happened with other distros. However, if this is what you want, you can disable the extensions.
2. Given stock unity - I think an almost equal amount of people would have been angry with this decision, and besides the codecs and other tools, it would have been basically a ubuntu + extras. And they couldn't have customized unity much from what I've heard.
3. Given XFCE/another desktop environment - They already offer alternatives which you can use as you please and many people would be unhappy if the switched from gnome.
4. Given Gnome 2.32 - They couldn't have done this and remained compatible with Ubuntu, and therefore it would basically be Mint 11, which you are free to download and use.
5. Given Gnome 3 + extensions - this is what they did and in my opinion the best option. It looks and behaves a fair amount like gnome 2, although I agree that it is not nearly as customizable, and it remains compatible with ubuntu
6. Given MATE - They did this too, which is a lot more than most other distros. This is the only way to give Gnome 2 while staying compatible with Ubuntu. They admit that there are a lot of problems with it, but it is the only option. Again, you are free to use any other version of mint (or anything) if you don't like this or until the bugs are mostly removed.
So, I think that the mint team did everything that they could to keep mint the best distro around

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Dell XPS 15 l502x - Debian Testing 64-bit NetInst Xfce, SolydX 64-bit Debian Testing, SolydK 64-bit SolydXK Testing
Old Gateway Pentium 4 Desktop - Arch Linux 64-bit Xfce and SolydX 32-bit Sid