The recent trend of mostly hidden dials until release seems to have come after the purchase of FFG by asmodee, and i can tell you why that is.
The major corporation reeeeeelly doesn't like vassal, and doesn't like people being able to play their games for free. Prior to ffg's (and x-wing's) explosion in popularity in late 2014/2015 and the companies acquisition by asmodee, it largely wasn't an issue. Now, however, the parent company has tightened the reins and I don't see that going away.
