Russia at the moment is looking for a face saving way out of this situation. One year Russian conscripts that have 6 months to go have a very different concept of motivation and risk taking compared to those fighting to keep their county.
The original terrorists have mainly deserted or claimed their 6x2ft piece of Ukraine and the motley few that were left either made an unwelcome return to their Russian homeland by a 19th August deadline or dispersed to carry out terrorist attacks throughout Ukraine. Many are being rounded up everyday by the SBU.
The troops that are defending the little bits of Ukraine that they still hold are Russian regular troops and special forces and and they are still losing territory, admittedly at a much slower rate than the terrorists, to the battle hardened brave Ukrainian forces. There are reports that Russia is having its own logistical problems in trying to keep an estimated 40,000 troops on the Ukrainian border and if they invade the longer lines of communication will only make things get much worse, especially as increasing numbers of Partisan forces are taking the fight to the invaders every night with shootings and bombings in Donetsk and Luhansk. This started off as civil disobedience with the painting of the Ukrainian flag everywhere during nightly curfews. This flag painting civil disobedience is also happening in Crimea.
Where there are 3 million Ukrainians in Russia, civil disobedience is also beginning to happening there with a famous Soviet star on top of a prominent Moscow building being painted blue and yellow, yellow and blue lines have been painted around the periphery of Red Square and Kremlin ornamental cannons have been painted blue and yellow. The Russian Parliament is now talking about banning Blue and Yellow paint.

There are also more and more Ukrainian flag waving demonstrations against the war outside the Ukrainian embassy in Moscow, with the demonstrators being roughed up and arrested. The Cossack regiments that Russia has relied on for their fighting prowess for 100's of years have their historical roots from around the Dneiper regions of Ukraine, including the Donbas region.
After tomorrow's big military parade of their latest military equipment in Kiev to mark 23 years of independence then this will join and boost the ATO in East Ukraine.
http://euromaidanpress.com/2014/08/22/open-russian-invasion-in-ukraine-act-of-desperation-or-pure-bluff/Russia at the moment is trying to hang on until winter to try to use gas as a bargaining tool, but the Ukraine has largely neutralised this threat by the reverse flow of gas from their Western neighbours into Ukraine to have full gas reserves by winter and a campaign to reduce domestic consumption by 10-15%, which should not be hard as one of the most inefficient users in Europe. With soft dropping oil prices from $112/bl a few weeks a go to $97/bl now and a dash for LPG terminals for their gas supplies in Western Europe along with the extension of a pipeline from Azerbaijan and Iran through Turkey in the longer term these are all going to further weaken Russia's Gazprom monopoly, the Gas station with a country bolted to it is heading for serious economic problems. Yesterday, Iran offered to supply all Western gas needs through this new pipeline.