The Microsoft Project team has recently re-opened their UserVoice feedback channel to the public for Office 365 Project and Portfolio Management – so get over to

https://microsoftproject.uservoice.com 

and let us know your ideas and suggestions for Project Professional (and Standard!), Project Server and Project Online.  You can either come up with a new suggestion – or use your votes to promote the ideas of others.  The top 2 currently are interesting ones – Notifications and better reporting for resource engagements, and the ability for team tasks to be self assigned to more than just the first team member to grab it.