I was thinking of it in aggro decks too. Mana denial plus a fast clock could prove to be good, and I was thinking of a Goblins minus Leylines but with mana denial instead.
I'd say that's a bad idea.  Ichorid is just as strong as ever, and Leylines help you deal with a number of problem cards ranging from Yawgmoth's Will to Goblin Welder.