Depending on the audience, we'd like to be able to filter to display different subsets of the features in a release on the release roadmap view. Currently, the filters only apply to entire releases and not the features contained within a release. For example, when meeting with the leadership team, we may only want to display features identified as critical to success, rather than the complete list. While it is possible to build a timeline report, the result is not as clean or interactive as using the Gantt chart in the Release Roadmap.
As noted, the release roadmap filters currently apply to releases on the page (as opposed to other records such as features).
Based on the goal of showing releases and identifying key features, we would suggest using the Features roadmap page or Timeline report. Both areas allow you to fully customize the feature view and you can share this through a Notebook.
Because of the availability through other areas along with current priorities and community feedback, we are unlikely to make updates in this area. We hope you can understand.