Any plan for enrich filters for `who to send to` audiences?

We are sending some parameters associated with events so that the same event could receive different parameters. But, we are only able to use those parameters in the section when to send but not in who to send. It forces us to include artificial events for making these distinguishing we could do based on parameters.

Any plan in your roadmap for enabling "advanced" filters for filtering based on parameters such as when to such as in who to? Thanks!