Masteria Expansions, Names and the proof for each

A Masteria update seems long, long overdue, we've had practically nothing for the past 6+ months, at least we had iTCG forging last year (extremely random cakes in sphinx don't really count). Did any meaning come out of those sun/moon tombstones or whatever in Bigger Ben yet? The developers must be insanely slow to develop something that had its design finished over two years ago.

There hasn't been anything from those yet... I mean the end of Crimsonwood Keep implies that the Crimsonheart Tombstone at the end is important in the near future, but so far the puzzle is still completely incomprehensible.