That ring of "Russians" on the Black Sea coast reaches all the way to Moldova and parts of Romania. There are already a couple of thousand Russian troops in Transnistria (it's like every other city block over there is a different country).
Odessa has been "Russian" since there was an Odessa.
The nationalists in Kiev and Lviv will get to keep a landlocked country with no agriculture, no industry, no order and no prospects.
They get to keep the part the Russians don't want.
Ah, but they will have the EU, and secular Western values.