Some comments. We must distinguish conservatism and traditionalism. Saying that a thing is good simply because it was done in the Russian church in the 18th is conservatism and not traditionalism. The church has always been "corrupted" by foreign elements. Some of them are really obvious on some icons.
1° the folded hands : it is catholic position of the hand to pray which was invented by the Franciscan in Middle Age. It is a copy of the position of the hands of the liegeman when he swears oath to his liegelord. Nothing orthodox here
2° the arms crossed over the chest is also a Western influence. It is pietistic attitude first described by the Renaissance Italian painters. For example in the Annunciation of Fran Angelico in Florence.
3° the general impression of these icons is that they look like catholic pious images. I was told that a monastery was really full of such "icons". A monk was asked how he could pray in fromt of them. He answered : "I close my eyes".
Unfortunately, with Peter the Great, the Russian church abandonned traditional inconography (that was preserved by old believers) and traditional singing too, also preserved by old believers, to walk on the path of westernization.
