Expand the calendar capabilities
For one, it would be nice to expand the calendar to a full page, to view the entire month and future month by month.
In addition, it would be great to sync the calender's with a third party OS. Transparency with invites to a meeting in the calendar view, by that, I mean see who has/hasn't responded to the request.
Brian Luisi commented
Possibly reach Skype for Business right from the calendar.