They may not be as powerful as them but they will get more of a say than they do now and maybe be a net recipient. Plus I suspect they arent happy about up to 98% tariffs on their agricultural exports and the loss of Scotch Whisky from being only used for whisky from Scotland along with the 20% export tariff on Whisky. Both are massive industries for Scotland. Whisky alone makes up 25% of all of the UK food and drink exports so god knows that that is as a percentage of just Scotland.
If I was faced with seeing the biggest two industries decimated I would be looking for independence and joining the EU.
Yes but Scotland does nearly 70% of its trade with the rest of the UK so whatever happens, Sticking with the union will be in their economic best interests despite whisky exports potentially suffering.