Hi Darren,
We do have future plans to add a feature that will allow collaborative communication between supervisors and agents while handling live contacts. We know that whisper coaching to agents while they are trying to listen and respond to callers can not only be distracting, but also very stressful to agents. So for that reason we are looking at adding a chat type feature specifically for use when live monitoring, and also for agents requesting supervisor assistance while handling interactions. These assistance requests and coaching initiations would then be associated with the conversation so that the data could be used in QM and Analytics. This is a future project, so no projection of a target date yet though we'd like to work on it this year.
In the meantime, I know that there are some customers who use the existing PureCloud private chat to communicate with an agent while they are monitoring calls.
Hope that helps a bit.
Best,
Lesley