The EC isn't unbalanced. There was an information deficit, sure, but the result of "gain relics for transmute" isn't inherently unbalanced-- you don't know the number of wins you'll have next round, either. I have no major complaints about the EC, though I will say that the timing is odd-- it would've been much more effective in a later round, when teams are actually low on key in-element cards. As is, I doubt there's any team that really benefits from exchanging two cards for one niche in-element card and a relic.