@charlesks - Did you ever find an app or solution for this? I was at Pega prior to joining MSFT and there was a OOTB email bot channel that had it's own portal where CSRs would triage and manage inbound email. The system automated a large portion of case types and then allowed an end user to engage when needed.
I have setup automated inbound capture of emails into Dynamics, however the UI isn't necessarily as ideal as I think it could be. And...it didn't seem that there was any specific design pattern.
I've linked a How To document I created on how to setup the inbound automation of emails.