Hey, this is very experimental, but what about Russia's conversion to Catholicism?
If Denikin and the conservatives take power, this might seem like a good move to switch to a similiar yet new church, not only getting rid off the corruption of the old church in the eyes of the people, but also managing to dissascociate themselves from the bad parts of the Romanov past and associate themselves with the good parts through religion.
Of course the mod still needs to be worked on to integrate already announced aspects, but when said work is more or less done, think about adding this in.
And if there is no conversion, possibly a holy war with the Turks which results in retaking Constantinople to raise Russia's prestige among the Orthodox nations?
Also, I remember I volunteered to look over OOBs a while ago, but only did so for Belarus before you disappeared.
If you'll tell me where the OOBs of Russia (and possibly other Slavis language nations, in particular Serbia, Ukraine and Bulgaria) I could look over and filter out the innapropriate ones.
Minor work, but why not do it for a slight bit more authenticity?