The only thing to remember there is the protocol stands alone from the people working on it, its not a normal company construct because this is the nature of crypto it operates independently.
   Rat4 is wanting to develop Blacknet by himself I think, thats his style.  Its not going to alter his previous work on BLK including that done by janko but he is going in a new direction.  I'm not 100% of what direction that is but clearly he is capable so it'll be interesting to see how he progresses crypto in his style.     BLK is not going to be altered by that change taken by rat4 except by this reduction in total BLK coins circulating.   Thats my basic understanding, its all optional and janko can always come back some time but he is busy elsewhere right now which is just how life goes right