I think people who joined the 320 before 2016 have enjoyed unprecedented movement up the seniority list, it has not always been that way and wont be guarantied to be that way in the future. I joined about 16 months ago, started at 95% and that’s where I have stayed not moved one place. 2017 might see some movement but not huge. My point is even on the 320 don’t expect rapid progress through the seniority system, so prepare for many years of weekend work and multiple reserves per year (4 in my case).