Slack - Material Redesign concept

Just found a concept of Slack with Material Design I made a while ago.

As an enthusiast user of Slack, I can't wait for the next big update of the Android app. So in the meantime, I decided to propose to you guys my idea of what the app with Material Design could look like, I hope you'll like it!

Considering the comment @SlackHQ made, I tried to conciliate Material Design & Slack's branding as much as possible.

PS: You'll find a comparison with Slack's current design in the attachements,