The rear shock comes with 3 spacers, its extremely progressive. Adding more bands will make the shock more progressive especially in the mid stroke , internal spacers add mid stock progression and increase the mid stroke platform on the progression curve. The spacer dont effect just the end of the stroke .
You have to think about it like this . At the end of the stroke the bottom out resistance is at its highest. As you add bands you are bringing the bottom out resistance down the stroke cure fuming up the platform, so the beginning middle and end of the stroke firm up , the platform of the stroke is getting firmer . The HSC dampening + or - counters bottom out resistance.
Getting dampening on rebound to prevent pack down as well as getting the right sag to desired mid stroke is key .
The problem is people dont understand how suspension works nor have the skill set to ride fine tun-able suspension. Most people should be buying the basic , sag, rebound , compression dampening shock thats set and forget.
I run a 2.75 wide trail Minion DHF in the low setting, I have tuned my suspension correctly and have not had one rock strike .