Well every one was hoping to see that too but unfortunately and sadly not possible.

As of now, the dailt rewards are still the same.  Once you get to the 30th day and get Druid, it starts back again at day 1.

on that case, here is an advice.. once you received the hero like frost witch, painda, paladin or druid you can consume it to add skill experience on your present powerful hero.

or save it for boost of might (because 60 lvl paladin gives around 350 might)

I always consume mine because I am trying to keep my might as low as possible.  I have 17,900 might right now but I have 3 legendaries over 140 and the other 7 legendaries are over 120.  Raiding is a piece of cake!!!

Keep them at lvl 1 cause that keeps your might low

now u will need all duplicate heroes as much as possible to use it in Heroes expeditions