wroot Thank you for the extensive feedback! Some comments:
Roadmap filters: the roadmap team is making improvements on the filters and we'll take your feedback on those into consideration. Like you mentioned, we understand filters are an important tool to stay on top of the most recent changes in this ever-changing world.
Message Center/Targeted release: Because of the way Microsoft deploys change throughout our tenants worldwide, it is impossible to give customers an exact date of when the change will hit their environments. This is why we hope to provide at least a window of time in which the change is deployed, and will continue to make announcements in that manner on Message Center. Also, there is an option for targeted release for Monthly channel users, as shown on this page.
Thanks again for your feedback -- it's critical as we continue to improve change management policies and resources.