Yeah, AS has become a lot more hit and miss regarding compassion and empathy for their customers. The phone and email agents tend to be better than the airport staff imo.
The Blue Angels add an additional interesting piece. They've known about the impact of this for what, months if not nearly a year beforehand? Why do the airlines (not just AS, but DL, etc) get a free pass for a known, planned ATC disruption?
It is an interesting situation. What is the MCT at SEA? Should it be adjusted given the recent addition of bus gates? Delays due to ATC used to be pretty rare at SEA, now they are the norm. It seems like it's a loophole to allow AS to sell you a ticket with a questionable connection time and then not be liable if you miss it.
Though the easy solution to all of this - buy your ticket with a credit card that has travel insurance and file a claim for your hotel charges.