I guess you have to try to I just briefly skim the source code, it adds 2 more component to pawn and pretty much like OP said it’s a WIP.
The way using Physics Handle for grab, pros/cons are explained by mordentral on that thread.
To be honest it takes a lot more than what’s shown here to fulfill what I would consider a functional VR ready Pawn.
So if you are good with CPP and would like to go down that road, might as well chip in/fork and make it or something better.