Build a Vertical table visual

There is currently no visual or custom visual that allows one to show data vertically in a table form. 

While workarounds exist to do this using a matrix, it has limitations e.g. you can't really pull together columns from different dimension tables.  

While I've never attempted to build any custom visual, I tempted to take this one up.

Would love to hear thoughts on what it would take to build a visual like this and/or what would be the easiest method to build one?