100% agree that we should have access to the technical inner-workings of the new system. As you know I have not been around much lately (pretty much due to the stealth-stall), so I just assumed such documents would exist - it seems rather silly to be funding such work without knowing exactly what is being funded, and if the technology being implemented is even sound to begin with - before any line of code is even written.
The good-natured side of me would say that @kencode has been too busy or that perhaps there has been some sort of miscommunication, I hope it is something like that - because I 100% agree with you, we need such technical documentation.