Transparent Icon in the corner instead of text for notifications
Actuallly, there is a text for all notifications. I play game with subtitle and very often the text is hide by the notification.
Could you, please, replace text by an Icon in the corner. If you want A full details, hold the xbox button or tap twice.
For an achievement: a cup
For a message/mail/sms : a envelope
To join group or chat : people icon
Similar for system...
Something like that for example.
Love this idea!