I have just read the “tease” he wrote on F13 and cannot avoid to notice that he keeps moving on repeating the same mistakes:

Raph Koster:
I do have an R&D group in which we do Cool Stuff ™ that I can’t tell you about.

(Yes, I’m being a tease. It’s cool stuff though.)

We’re trying to focus on stuff that is cool immediately and obviously. A big part of why I wrote the book was because of wanting to get back to basics and focus on fun. So far what we have is cool and fun in a sort of shallow way, but you can see how it can be fun in deeper ways. That’s why it’s R&D though, it’ll take some iterating to get there.

Again trying to design starting from the raw theories, again putting the mind ahead of the body.

It didn’t work, it doesn’t work and it won’t work.

Anyway: good luck. In the meantime I’ve ordered his book (finally out) from Amazon. It should arrive before Christmas.
(I also should remember where he is – Raph, not his book – and where I am, before opening my mouth and pontificate)