In Ukraine this is a question of Ukrainian nationhood, not secularist sympathies, and it is clear that the Ukrainian nation, weighing the pluses and minuses, prefers Europe to Putin.
In my opinion, MP is precisely the Soviet Orthodox Church, and so naturally the Soviets in the Ukraine would probably stick with Gundyaev. The unified Russian Orthodox Church does not exist anymore, except for some Orthodox splinters of ROCOR.
Wishful and very biased thinking on your part.