Reviewing through your inquiry I would suggest reaching out to the Jive Developers space here in the Jive Community as there you can collaborate with other developers on potential custom integrations you are interested in.
Additionally, if you would like assistance developing a custom integration for your instance our Professional Services team can work with you to determine the scope of the project and help in designing a solution which meets your use case. If you are interested in this option please submit a case in your secret customer group here in the Jive Community and the next available support member can get an engagement started.
Lastly, as you mention Tableau, you might find the following blog helpful Tableau & Jive-x / Jive-n
Hi Jennifer, we actually went another route rather than using Tags as our common denominator, we used Key word search. We built out a calculated field in Tableau to narrow down:
//filter this to "true" to limit forum posts down to only topics with these keywords:
There were obviously way more "OR" statements in there, but that was the structure.