Shock issue is related to carrier wheels being moved into the center of the upper arm from the outside so they will contact the clicker end resi or the evol chamber on the air shocks. The coils will work on the '22 rear arm.
As for the new sled ergos,
Rider input and overall balance feels virtually identical, quite a bit more cockpit room allowing you to ride in the neutral position even more then before. Also bringing more of the mass closer to the center the sled just whips around nice and easy. They have don an incredible job to continue to make the easiest mountain sled to ride even easier. But if your coming off an axys its going to take all of 10 minutes to be right at home. When demoing all the sleds the biggest challange was just shock and bar changes between sleds, otherwise is it was straight into some tight trees and blasting up creek bottoms on our ride.