Rules - Import / Export & Run All from Rules screen right away.
Fror there to be a way to import / export rules i.e. back them up. not just sync to iCloud.
and there be a run all rules now from the rules window - as you can do in outlook!
And import Gmail filters to Airmail 3 rules.
I have more than 80 filters(rules) created through my 9 years of using Gmail. it keeps my inbox clean.
But now with Airmail 3, my inbox is a huge mess! Productivity (zero)! And it's NOT realistic to make me write 80+ rules again from scratch!
I totally recommend this feature.