Make of this what you will. I've checked with three different distributors today. One isn't offering even a guess of a release date for S&V. One has pushed their nebulous "January" release date to "February" (for what it's worth, this distributor had always listed 1/26/15 as the cut-off for pre-orders, so there was never much chance of S&V coming out in January).
But my third distributor has a date set. March 1st, 2015.
Again, I don't recommend anybody take this as the Gospel according to RagnarokSquadron, but this is the first time I've seen an exact date pinpointed from an actual game distributor, and not from Amazon or some other online retailer.