"Personally I think there's demand for both all slavonic churches, half and half churches, and all english churches, and that need should be met rather than creating barriers to folks."
Creating barriers in a Russian parish to full participation in the life of the parish to Russian immigrants is monsterous as it would be if we were to do the same to Greek immigrants. The parish ALWAYS has to be home for immigrants from the old country, no matter how American or "pan Orthodox" it has become.
Creating barriers to English speakers is as bad though. I think you're right that there's parishes that get 'captured' by either (immigrants or converts) and start getting exclusionary.
I don't want to see ROCOR being coming an immigrant only club, but I don't think First Heirarch Metropolitan Laurus is leading us in that direction even if that's the way they MP would prefer it.