Seems to me a win-win scenario. Remember that Ukraine is actually remarkably good at railways - especially at manufacturing large numbers of comfortable and good-value sleeper wagons, which the rest of europe lacks, and also at maintaining their system in such adverse circumstances - their punctuality today is still much better than DB. On the other hand the track routes in Ukraine are anything but direct, dating from 19th century when capital cities were Petersburg and Vienna (so they align better N-S than E-W), so there’s a lot of potential to make them straighter. The obstacles maybe rather regional mistrust - whether politicians in Suceava accept the status of Chernivtsi - a similar question as whether hungarians / slovakians accept Uzhhorod, polish Lutsk or Kovel,…? Better passenger transport links could help to build trust.