Your comment is a little disingenuous. The Labour party in Scotland very much distanced itself from Corbyn from day one, so whilst no voters thought that the “20 Blairites are ruining it” they certainly were intelligent enough to see that the party was all over the place and completely at odds in Scotland with it’s Westminster branch. Indeed, a Blairite party — which given the BBC talk of expected Corbyn overthrow — would be very undesirable for most Scottish voters, and most previous Labour voters in Scotland will see that as the true aim of Labour in the UK despite Corbyn and so switched to SNP after the referendum (pre-Corbyn). In short, there was nothing in Scottish labour campaign distinguishing it from the Miliband and Blair eras that would make it worthwhile moving back (remember, the voters that shifted from Labour to SNP in Glasgow and other areas took years to do so) for most Scottish voters. If the Scottish party had made more of an attempt to align itself with Corbyn I suspect they’d have seen a recovery of sorts. However, I’m in agreement with Paul here in that a federal Labour would be the best tactic.
PS. For background: I’m not a Labour or SNP supporter, but I am Scottish.