The best way to make your suggestion known to the Moodle community, and have it reviewed for possible inclusion in Moodle core, is to create an issue in the Moodle Tracker (if it's not already there). You'll find the tracker at http://tracker.moodle.org
Alternatively, you can join the Moodle User Association (MUA). The MUA is an official non-profit organisation dedicated to contributing towards the core development of Moodle. It’s members are able to propose projects for development of new features for Moodle Core. For each release, they vote for a project and the project that receives the most votes is included in the next Moodle release.