First, although I have a standing blessing to perform Western Rite services, the parish in which I currently serve (Holy Protection, Austin, Texas) is an Eastern Rite parish in the standard ROCOR tradition, with standard customs, mixture of English with some Slavonic, standard music style. It's a typical ROCOR parish. I have never celebrated a WR service at Holy Protection.
I have done WR in Oklahoma City (St. Benedict's ROCOR, where I served as a cantor) and at St. Nicholas women's monastery in N. Ft. Myers, Florida (ROCOR), where I celebrated the divine office and holy Mass in the Roman rite (Sarum use).
But in the Sarum Use as approved for the ROCOR in Sept. of 2008, there is no celebration of the Corpus Christi feast. The RWRV has some places which keep it, and other places which do not keep it.
The three-fingers, right-to-left sign of the Cross was, if I understand correctly, always done in the Russian Church's Western Rite (whether Moscow or ROCOR's). In the Antiochian jurisdiction, time was when the five-fingered, left-to-right sign was very widespread and was defended, although some also did the other way. Then, some time around the late 1990s, it seems, there was a decision by the AWRV to go from the "Western Patrimony" (Western culture and tradition including all the Roman Catholic changes and developments across time) to the "Western Orthodox Patrimony" (Western culture and tradition from the times when the West was in communion with and was a part of the Church), as regards, that is, how to make the sign of the Cross.
And there are doubtless more such adjustments coming, as the Western Rite finds its path, its way, remaining true to its Western roots while pursuing its place within the "big picture" of the Orthodox Family. It would be unnatural if this process did NOT unfold.