With talk of SNP being 'not hostile' to another EU referendum I do wonder if the Scotland vote could ever overturn the 'will of the English and Welsh' people enough to settle the matter. In many ways the entry of a solely Scottish party into the debate is likely to be viewed with hostility from the media in London. Channel Four is already getting in a froth over the possibility of disruption in Westminster.
If we were in a real union then the views of Scotland and N Ireland would already have been put into the mix rather than shunned.
The (unlikley) prospect of the votes of the Scottish electorate thwarting the (mainly) right wingers down south would solve noting of course. Imagine the outrage of a Brexit reversal (currently being ruled on in the ECJ thanks to Alyn Smith and others from all parties - except Tory)
In the end it's pretty obvious we are in a different country politically and I don't think it's going to converge totally with the views of many down south. As remarked before it would be much easier if moderates there started swaying opinion back into staying in CU and SM at least (as suggested two years ago).
The question of increased self governance for Scotland would then be easier too.