Hi roro
I guess by 'situation' you mean entry procedures. Well as far as I know no, they haven't really. I went through again in 2011 and it was pretty much the same.
Russia - need insurance. Now there is Putin's customs zone consisting of Russia Belarus and Kazakhstan, so when you enter one of these countries with a car, you have three months in the entire region with your car.
Kazakhstan - need insurance
Uzbekistan - nothing in my experience, except some strange eco-tax at the Gusht-Koprik border directly north of Tashkent (this was soon closed to foreigners after I came through, but it might have reopened, not sure...)
Kyrgyzstan - nothing as far as I know. Very relaxed
Tajikistan - don't need insurance, but have to pay $20 or something for the car, and have a max of 15 days, although this can be extended in Dushanbe.
Turkmenistan - still need to pay all sorts of things at the border. When I first visited in 2007, diesel cost about US$0.01, and on a 580 km transit from Konye-Urgench to Bajgiran, I paid $127 from memory. In 2009, diesel was maybe US$0.40 or something like that - much more expensive than in 2007 (though still cheap), and for a 750 km transit from Imam Nazar to Serhetabat I paid $245. So basically the fuel has gone up in price, but they still charge you the same, or greater fuel tax. Still, Turkmenistan is one of my favourite countries and well worth the expense! I'm hoping to go again this year on a third transit, this time 850 km, so we will see how much they tax me then
As for Afghanistan, well that will almost certainly change this year. I'm waiting very nervously to see what happens. I do have a little idea to go and try to cross the Zabol - Zaranj border and go to look at some stuff in the desert, but I need to check things with my contact there as Nimruz is not the safest of areas...