This is impossible. At this point it is impossible to make this deal, that Russia will be satisfied only by the recognition of Crimea. Russia will never give up the conquered territories, except by military force. But Ukraine is not in the position to take up again them by force. Trying to do so, Ukraine is destinated to lose further territories. In Russian controlled territories, Russian flag has been hoisted, all has been Russified, even school programs and telephone operators. Furthermore, Russia has made a law in order to allow all Ukrainan citizens to have Russian citizenship, while Ukranian law severely bans double citizenships. It is absolutely clear that Russian end-state is to take all the Ukraine, by collapse of the leadership, or by force if necessary. Russia wants this. That this is right or wrong, it's an other talk than this. To hyphotize scenarios in which Russia is satisfied from recognition of Crimea, it means to be out of phase from the reality, at least of almost 5-6 months.