This maybe have something with to do with the major changes in Gnome 3. Im not a user of Mandriva and I like Gnome 2.x a lot and I like to chose but I still think it a good move as the developers can put more focus on that desktop.
‚ÄúThis concentration of our efforts allowed us to make Mandriva Desktop the best KDE-based distro in the free software industry,‚Äù the software's developers explain.http://www.pcworld.com/businesscenter/article/239060/five_good_reasons_to_try_mandriva_linux_2011.html
Most of all, Why would you like to loose you dedicated customer's??
So why do you post that here? If you are one of Mandrivas customer I suggest you talk with Mandriva.