Tolerable, but will be notable for what its worth as that would still be "millions upon millions" lost and then more lost through the legal follow up.
Possibly, never really talked to people about that, most English people just think the Scots are whiners for the most part, but that's because people like to joke everything up into not a big deal. Pride would probably be the last thing on peoples minds though... Just utter "Uggghhhh! Another political slog down?" would most likely take precedence.
Needless aggravation and a sprinkling of blame shifting all things considered, Scotland was going on about independence long before Brexit. In fact, chances are, if Wales and England get convinced enough that Scotland's independence was caused by the fact they voted overwhelmingly remain... They'd probably just once again, call them whiney babies, some talk about how you lost at your democracy and then a rebuttal of we answered to your demo' with our own yadda yadda... And then English people and Scots go back to flipping each other off. With a few brutal beatings in between.