The SNP will probably privately be quite happy to go to the polls. Even if unionist parties did win several more seats - which is not a given - it is still likely to be an a ringing endorsement for the SNP with them winning the vast bulk of the seats. The idea that the bulk of Scots don't want another vote doesn't hold up. Most polls have showed it as about 50/50 as to whether there should be another vote or not.