I maintain master lists of initiatives in one sheet for each program I'm tracking but not managing. When conducting reviews, I filter the list of initiatives based the stakeholders I am meeting with. Most often, the Children of row item that matches the filter criteria are needed for discussion during my reviews.
I currently manage this through a work around formula in a hidden column. It would be much easier if the filter box include an option to "Include children rows" as it does for "Include parent rows"