The way it looks to me is the spacer with the factory shock allows the suspension to droop further. This puts the ball joint beyond it's limit causing them to pop like they've been doing.
The Outdoorsman won't droop as far keeping this from happening. Even Bilsteins don't droop as far as a stock shock and a spacer so they might avoid it.
Realistically, if you're careful during install, and never see anything but pavement you might be able to avoid the issue if the suspension doesn't droop out fully, but why chance it? There are even some out there who are running them without issues, but with the amount of problems experienced, it seems like addressing the issue is needed.
I have a HBS 2 inch that I will be putting on my '14 this week. I purchased the Zone upper arms to prevent the issue altogether. It's only two more bolts and should barely add any difficulty or time to the install.