We can already see which parameters are available to iLogic via the Rule Editor.

What would be really useful is:
The ability for iLogic to show which parameters are actually used within a rule, rather than just listing those that are available.
An enhancement to the Parameters dialog to 'indicate' which parameters are referenced by any iLogic rule in the file.
- An enhancement to the Parameters dialog to 'lock' those parameters that are referenced by any iLogic rule in the file.
This would make it much easier to audit rules, identify unused parameters, and safely refactor models—particularly in complex or long-lived designs.