Well, there is not big difference in value of cards in arena and standard... Basicaly only two. In arena you can afford play high mana cost cards without some big risk. And second, some card synergize with class/other cards so much, that they outvalue pure value of standalone cards.
Why only aggro? Even more, why aggro exactly? It is more fit for control. And almost useless for aggro.
Well, there is not big difference in value of cards in arena and standard... Basicaly only two. In arena you can afford play high mana cost cards without some big risk. And second, some card synergize with class/other cards so much, that they outvalue pure value of standalone cards.
Well, i very often disagree with your rating. But only time will show us true value of cards.