My co-worker sitting next to me here at work, who is Ukrainian-Ukrainian, not Russian-Ukranian says:
"Both sides are *expletive deleted*ed for various reasons."
And he doesn't think splitting the country into it's majority Ukrainian half and ethnic Russian half will help. Although he does not think not splitting it will help either.
To him the Western Ukrainian part is a low-skilled economic basket case that just wants to suck off the EU like Greece did until that economic turd hits the fan just like Greece, and the Eastern Russian part is a post-Soviet rustbelt as Balog mentions, and the Russians just want it for port access, pipeline access to Europe, and military base positioning, with a healthy dose of ego to regain Soviet glory days.
He doesn't sound real upbeat about it either way.