I think it would be useful to merge Calls and Meetings into one module.
Maybe consider Tasks also?
I personally miss the old combination of 'Activities' and History' modules (from v1 -> v6.5) that covered all activities outstanding and completed between them, as it simplified both User reporting, and gave a simple single 'timeline' view of latest activities.
Look forward to support or feedback on this one from anyone else that thinks may be useful or has an opinion. :-)