Seeing Who Has Unsubscribed From Sequences

My company has recently upgraded to Reach and has begun enrolling leads into Sequences, it would be really helpful to be able to quickly see and group together everyone who has unsubscribed from the sequence so we can be mindful of future communication. 

The current system of creating custom fields and having to go into accounts individually is not efficient, especially given the volume of our outreach. Hopefully this can be addressed soon.