By glossing over all the details as “surmountable” you are illustrating how easy it is to ignore critical complexity. Debt includes concepts like “what does independent Alberta actually own or have to go into debt to purchase if major assets within its borders are literally Canadian federal property or connected to existing treaty rights?” This answer makes or breaks the entire proposal and does not have an easy or obvious solution.

I'll give you that currency isn't a huge issue. From what I recall, Quebec wanted to continue using the Canadian dollar if they separated.

If they opted to go with the USD, they'd have to trade all their CAD - which will undoubtedly take a huge hit if they separated.

I still think that separatists would say that Alberta doesn't have to deal with a share of the debt and that would be a sticking point.