I read the wrong topic in search of new info on the new rulebook. But I found finally what I was looking for and that's what matters. And the new info is: date of release is unknown. They might release it sometimes.
But they at least acknowledged they came out the news prematurely when they really didn't know if they even release it. They got a system from a dude which looked very promising and that rose the flame of their spirit high and made them overly optimistic. It was a system what deserved attention but only after they took a closer look they recognized it's shortcomings. To correct everything and the shaping of the system to fit MAGUS well proved to be a slow and too large work to see the end of it.
There are other tidbits how the system works, character creation, the vision about the magic inner operation etc. which mostly looks promising but for now they are just nice words. And maybe it will remain just that. Oh well.
It seems they released few new novels, maybe anthologies in recent times tho.