And Ukraine gets the right to join NATO. That's a face-saving result for both sides that has real potential as a permanent solution.
I'd point out that Ukraine already, as a matter of policy, is on record as supporting elections in the Donbas under the Steinmeier Formula. So it is a matter of ironing out the details, and perhaps some compromise regarding the processes could be reached.
Really not that simple. Russia had totally manipulated & invalidated previous election for Donbas & Crimea in 2014.