Have a list of all tuning parameters
Currently, only common tuning parameters are visible by default in PI System Management Tools. Somewhere, whether in PI System Management Tools or online, there should be a list of ALL tuning parameters with their description, subsystem, minimum value, maximum value, and default value.
This would let PI administrators set the tuning parameters proactively rather than reactively. Instead of the PI administrator needing to think "might this tuning parameter exist?" or waiting for a problem to occur before learning about a tuning parameter, they just need to look through the master list.