This will give huge slap to all players, making it harder to max the huge number of heroes, or ANY number of hero(es). The economy problems with this game are already terrible, and the idea of newest CH cost 15 is gross, but increasing costs ALL across the campaign will definitely leave a scar and making another wave of people leaving the game.
(Any increase in normal campaign also increase in the elite)
Thankfully it won’t happen… I guess, this is DH, who knows?! 
PB should decrease the costs to 6 in all chapters, not increase them, or at least give more free stamina.
It’s just sad to watch the killing progress of this good game… ehh
