Have you reviewed all the information at the below page? http://www.ir.com/prognosis-unified-communications/vendors/skype-for-business
The ebooks? The video's? The webinars?
I do believe those video's and webinar recordings have some great content.
When you say functionality, can you expand a bit so we know what pieces might be missing from the above? Also, I will make your IR Account Manager aware of this post and ask that they engage you further on this need.