I speak because I am advising my brother who already has a local partner for the implementation of odoo in his company, he is a commercial manager and part of his department has telemarketing, I am a business administrator and I am currently working as a telephone technical support for another company, having knowledge in the sector, I will send you feedback so that if possible these functions are integrated for the future: 

-Customer authentication in calls or chat for existing customers to block sensitive crm information such as Personal Identifible information (PII) and Customer proprietary network information (CPNI) , for example, either through a pin, the last 4 of the social (SSN) security questions or two steps of verification, id scan, to prevent fraud, especially if there are means of payment in the client's user. 

-  An identity "score" could be calculated, and the identity of the user or customer is either given the "verified" status or not, based on the score.

-on chatter leave a trace of auth method or if it was bypassed add the motive from preselected categories or add categories in it

-have authorized users for existing customers.

have a way to remote detect risk of employee fraud and theft of money of services, that's why many people needed the approval app to segregate duties.