I think the independence movement has peaked and will take a little time to get going again.
Independence can be avoided if the UK goes through a reforming period. Change the voting laws, change how Westminster works, federalise and increase powers to the regions etc.
Otherwise it's the pizza analogy. Scotland and England are two pieces of a cheese pizza slowly being pulled away from each other, with ever-thinning ties that will eventually break.
I think Scotland's time as part of the UK is finite. I think that either reform or disintegration will occur.
I'll say this again btw - if I had the ability to, I'd happily trade a few LD seats in this GE for a Tory minority government and another election later this year. But that's a weird tradeoff, as the more seats the LDs win, the more likely a hung parliament is!