The BBC reports March 30th, that the ceasefire is more or less holding http://www.bbc.com/news/world-europe-32114522 . The BBC also reports that Russian troops are key to any advances. Just as in Crimea. Where Putin now claims to have planned the annexation.
New wrinkle is to hide the Russian troop origins. Different units are now mixed together, trained close to Ukraiina, and then sent in.
How many troops? Here is an estimate http://www.bbc.com/news/world-europe-31794523 of thousands being used. Though the best source of information appears to be Russian media and the mothers of those Russian troops returning home.
“Shche ne vmerla Ukraiina” but still a way to go before the country is healed.