Actually, I think more important thing is that all Orthodox (including OO - Armenians) celebrate Pascha in the same time. I don't see any excuse that Finnish Church celebrate as Western Christianity. I've heard that also some parishes in Switzerland have blessing to celebrate the feast of feasts according to Gregorian calendar. Celebration of Pascha is one these things that unite Orthodox people, so why to be disunite so much, as it's going to be in the next year?
The solution made in Polish Church that each parish can choose calendar certainly has some advantages, because e.g in Warsaw it's more difficult to celebrate Nativity according to Old Style than in Podlachia.
But as we're not so big Church, it's a problem for clergy and families from different parts of the country. But the most ridiculous is our metropolitan cathedral that has 2 calendars. I can't imagine how the priests from it can feel.