Modern web UI is nice, but at the end of the day when it comes to mobile, apps are still king.
If the purpose of this is to replace the interaction we had on Yammer, a mobile app is a necessity...
Thanks for your feedback, Brent Ellis. We're happy with the way this new community reacts on a mobile web experience but we also hear your concerns. We're looking at the need for an app but don't have any information to share right now.