That was my first thought too. Only problem is that there is no method I am aware of to do a batch change that can guarantee preserving the preset's current value. For example, being able to execute a "+1" to the current parameter value in each preset, and then back it out with a "-1" in the next global preset save. You need to use a specific value and if that parameter is using something different in some of your presets, you run the risk of modifying it. Even after "backing it out". That is why I want to only modify a parameter value I am fairly positive will be exactly the same in all factory and user presets. Or, I will just wait and modify presets as I use them. Not stressing particularly over it.
Would love to be able to force a global save without changing anything.