Maybe its just the third expansion factor, but a bunch of the revealed cards (
https://playhearthstone.com/en-us/cards?set=descent-of-dragons) seem stronger than usual, even in neutral. Dragon synergy seems strong as usual, but even stuff like 7/7/7 taunt/untargetable, 8 mana 4/10, battlecry deal 4 damage to 2 random enemy minions are both strong on commons, and in general on things that are going to be in a tribal discover pool a lot. The breath spells also seem strong when theyre turned on.