maybe separated in STANDARD (as it ist) and ADVANCED and USER.
This can avoid confusing complexity for standard user-tasks.
Prime would be, if USER can decide what parameters are important and set it in the USER chapter.
E.g.: Some people draw joblifetime suspended ceilings (fortunately not me :--)), other do fire prevention design...
Both will never need all parameter their property calculations, but the parameters they need, they need daily.
Yes i think the way they have separated Library Part Parameters in schedules is fine. They could do the exact same thing for properties.
Although i have a recommendation about the way you find the right library part parameter. I think it would be easier to drag n drop parameters from the property window of the object you are interested in. Lets say you want some parameters from the Zone tool. You could have some sort of side window of the Zone Tool so that you can easily find what you need. Right now there is a list of all parameters but its difficult to say which is which most of the time.
Also in some small offices, as the one i work for, you have to do everything, may it be ceilings, flooring and we need to be able to schedule everything with relative ease.
Just as long as we have access to all the necessary data we can build a better workflow.