As a close follower of Soviet block countries, I can assure there has been no "repatriations" as you put it since Soviet union broke up. Yes some players have started to play for their birth lands, but not after playing for Russia. The only real example of a player who has suited up for two post-Soviet countries in an IIHF tournament of any age is Evgeni Nabokov. Denis Falfutdinov managed to play Kazakh U sides ~15 years ago, but later on appeared for Kyrgyzstan's team in Asian Winter games couple of years ago. Just to be thorough, I'll also mention Yevgeni Pisarenko who turned back to, funny enough, Ukraine and now represents Romania, and if I recall correctly scored their only goal against team Ukraine when these two teams met last time.
Not sure if I'm awesome or really, really sad for remembering all this (besides Falfutdinov's full name) without any reference.
So "repatriations" of babchuks and komaristys of this world seems very, very unlikely.
It's unlikely if we look at it in an historical bubble, but times have changed and Donbass exists now. The PHL (err...) exists now (as a VHL farm alternative for Donbass; maybe they move their PHL affiliate to the VHL in the future as a farm?)
Point being, these guys who had a cup of coffee on the Russian team who have no delusions of ever competing internationally again for them, could potentially repatriate. Babchuk? Probably no, he still has WC potential and would need 4 years in Donbass, so that's a long shot. Komaristy? If he ended up on a Donbass farm team for 4 years, why not? He's not even in the 'K anymore, and that's why I mentioned the idea.
Sure it's never happened, but Ukraine poaching Russian players has never happened before either until now. Donetsk is being aggressive about this, so it's not out of the realm of possibility to at least theorize and day dream. If Donbass acquired any of these guys, I think we could have a legitimate discussion on whether a Nabokov-rule may be invoked.