I wouldn't mind a new myth spell, that attacks all. I don't use earthquake, because when I'm fighting with other friends, it takes down their traps, as well. And I stopped using the frog, because well, I'm almost a level 81 and the damage is very minor. Something that hits all, would be great. But not something that takes down all of the traps.
Not only humongofrog, but Earthquake. There could be some other all-attack spells for Myth that i haven't heard of. And, do not rush KI, they have a lot to worry about already. And plus, you never know, they could be working on an all-attack Myth spell right now. ;)