I suppose the question many would ask, is why stay with a system where you don't have control of how much you spend or of any economic policies and where you are running a large deficit?
There is the small issue of things like the funding of HS2 etc into this and attribution of income and expenditure plus debt. Where does the debt of Network Rail sit within all this for example.
At least our place in the EU is certain.
If you read the notes to the GERS report, you will see all the things that are and are not included. On the question of HS2, for instance, only 2% of the HS expenditure is allocated (and of course, most of the expenditure hasnt happened yet!) rather than the population share of 8.9%. Other projects frequently assumed to have costs "allocated" to Scotland within GERS, such as the Thames Water Sewage pipe and Crossrail do not have any costs "allocated" to Scotland. GERS doesnt look at debt, only income and expenditure, so NRs debt isnt an issue.