hi,
to do analysis on the project - you have to use spaces.
however, sometimes there are special standards/ calculations that must be made.
and the automated revit parameters dont give an answer.
allowing shared parameters as instants will allow to make "information plan" (for HVAC for example) easily
in addition: in "specified" parameters (like "specified air flow") it will be better if it was possible to use other parameters - like when writing a formula.