Builders have always made to many coins it's kind of ridiculous I think raising the amount of coins per a heart would be good idea. Mines we're meant to be placed ahead of a battle not into a battle. I'd really like to still avoid people throwing them into the midst of a fight. The mine timer increase wasn't actually as significant as everyone seems to believe. Archers have always been able 'rape' mines. We might still decrease the mine timer, as we've done some other changes with them that nobody has seemed to notice.