It's also I think indicative of a split in the SNP between town and country, and indeed one that is true of Scotland beyond the SNP
The ferry debacle has seemed to many central and urban Scots an invention of the media but it's about life to those on the islands.
This is an important point - in population density terms, Scotland is far more concentrated in a single area (the central belt) than the UK is, which although London/SE dominates there are major population centres in Birmingham, Manchester, Newcastle and (of course, Glasgow).
So while I fully accept that Scotland currently rails against 'Westminster' rule - in other words, people from down south who don't understand us, there is a risk that an independent Scotland becomes even more centralised, towards the central belt population, to the exclusion of the rest of the country.
The problem is that regardless of how you carve up a country there will always be people who feel disenfranchised because another part of the country, with most of the population, necessarily dominates. And typically that will be where the parliament will be based.