Client Center for project management, invoicing and support tickets.

I would like to know if there are any ways to use existing WPMU Dev plugins to create something like the third party plugin WP-Client. Their plugin seems neat, but I'd rather work with WPMU Dev. I found a similar thread in the FAQ here with no response: https://premium.wpmudev.org/forums/topic/creating-a-private-client-area

My goal is to provide clients with online invoice review and credit card payment, project tracking functionality, estimate presentation, approval and conversion to invoice, and tech support requests all in one place/Dashboard.
If there's no way to use existing WPMU Dev plugins, is there a plan to perhaps create this? As an agency it would be an exceptional client support tool.
Thanks..