Anyway, notice that these nerfs are actually a potential buff for some decks, like Even Rogue, and Totemic Odd Shaman (with Thunder Bluff Valiant and Bloodlust).
As for your cards, I would give them respectively: (5), (3) and (5) [ofc on paper, any evaluation needs testing].
I think the new mana costs are more coherent with the power/potential of the nerfed cards. Especially on the long run, and considering Wild.
If anything, Blessing of Might should have been hit with the nerfbat together with Cold Blood.
Anyway, notice that these nerfs are actually a potential buff for some decks, like Even Rogue, and Totemic Odd Shaman (with Thunder Bluff Valiant and Bloodlust).
As for your cards, I would give them respectively: (5), (3) and (5) [ofc on paper, any evaluation needs testing].