I'm also curious if it's partially caused forward and rearward shocks. @RPG has a reverse kit for the driver side. I wonder if it would fix some of the issue.
2015 F150 Rear Shock Mounts - RPG Offroad
RPG's words on the front and rear facing shocks
"Yes the primary objective is to reduce axle wrap caused by soft leaf springs and power, but there is a huge problem with rear steer.
Being that the Drivers Side Shock is mounted rearward on the top and forward on the Passenger's side.
1. the rear end wants to steer to the Right when being compressed
2. steer to the Left when extending
This causes the rear end to feel very loose... Not to the fault of the shocks or Springs.. But a compromised Chassis design."
2015 F150 Rear Shock Mounts - RPG Offroad
RPG's words on the front and rear facing shocks
"Yes the primary objective is to reduce axle wrap caused by soft leaf springs and power, but there is a huge problem with rear steer.
Being that the Drivers Side Shock is mounted rearward on the top and forward on the Passenger's side.
1. the rear end wants to steer to the Right when being compressed
2. steer to the Left when extending
This causes the rear end to feel very loose... Not to the fault of the shocks or Springs.. But a compromised Chassis design."