Thanks for those tips! I notice I tend to count my air forearm rotation by stressing the downbeat, so I think I might already be doing this. But I also think this is causing me to get tripped up on the upstrokes, since they are a tiny bit weaker.
The tip about the pick angle is spot on. At first the only way I could perform the motion with the pick having any contact with the strings, was by turning the pick around to the round end, and just sliding across (i.e. minimized resistance). So yes I fully agree that changing the pick angle to reduce drag across the pick will help.
Here’s a bit of an update for those who come across this. I’m starting to have some success with bringing the motion to the guitar. It just took a few days of perseverance and shutting off my brain haha. Now the plan is to get it consistent, and not with my picking hand completely floating and pointed straight at the floor lol