Hi all,
A quick note to let you know that I have updated a little bit more the Wiki example
I am experimenting (very slowly) to add to it what others have posted to this thread: for now, VertexPosition, VertexColor and U, V.
I hope this will help new users!
If you want to propose update(s), you can do it directly via pull-requests (https://.com//UE4ProceduralMesh)
I am doing all this with UE4.5, but if anyone is interested it would be easy to keep a separate branch for 4.4 or earlier.
Let me know!