To be honest I don't. It's been a while since I ran CoD, or any OP games for that matter (save for an entirely homebrewed Exalted).

As for my rational while writing the Proximi, I was designing them largely as a stand alone thing and didn't want to lock my concepts to the 5 canon paths. And the Yantra thing was purely for ease of book keeping. That said, I would encourage you to make any changes you desire for your own table. That's the spirit of homebrew after all!...