Just recieved an email advising that USCIS had taken action on our case.
Checked on myUSCIS and saw case approved as of 15 Oct!
Seattle FO - no interview or RFE!
Honestly, the speed was surprising to me. I had heard that the wait at Seattle FO was expected to be up to 2 years.
I have updated my timeline - hope everyone else hears something soon too!