Ideas to make calling system more robust!

I love the Salesmate phone system and how it has calling and SMS features. 

Suggestions:

The main one I’d like to see is the option to drop a prerecorded voicemail while calling a number to save time when making sales calls.

And also the ability to add Ringless Voice mail drops to sequences (campaigns)

Autoresponders for SMS - these work with key words and allow customers to opt in by texting one or phrase to a number. Great for marketing and customer relations.

Another thought was An IVR system in the future - allows for multiple options in directing a call... 

Thanks.