A few years ago Rath was working with very similar shapes, the direction was promising but never really succeeded properly. Below is a piece from the time in question, while this was probably one of the more successful versions using this type of letter structure, on the whole it never quite took off properly. I think at the time Rath was more focused on technical issues which prevented stepping back to see and release the potential.

You can see similarities in the letter structures working off a base of trapezoidal shapes mixed with some curves. The intention was create dynamic shapes that worked as well as abstracted shapes as they did as coherent ( to the seasoned viewer) letters. 

the below piece borrows a bit from many stages of rath letters, now creating a much more successful whole, with loads of rooms for improvement still.