Make an option where you can make an composition an Master and then u can copy it unlimited times in the timeline and then make changes without effecting the original Composition. Maybe u also could make an option to reset the layer in the timeline to the Master. This would really help with making presets for multiple use.
Thank you for filing this request.
The functionality you describe was added in April 2018 release of After Effects (version 15.1; note that the current release as of April 2019 is 16.1.1), it is called Master Properties.
Details on how to use Master Properties can be found here: