No ScaredGirl the reason of switching sides is not "the fun",
the reason is obvious and proven by all PvP events.
Unless you're Gl1tch, you have zero grounds for making this claim.
Life sucks in pvp. And sucks hard. No creature control, no permanent control, no stall decks(exception : the flying staffs deck).
And yet we placed 3rd last war?
To make good decks you must spend double time to find good and unexpected duo- trio decks, but life has bad synergies so it makes it much harder.
We honestly didn't spend that much time finding good and unexpected duo-trio decks. And let's also keep in mind that those are, amazingly, not the only types of decks used during the war. Regardless of whether or not any of this were to be true, I don't think that a previous master of an element would disown it because it "sucked" otherwise I'm inclined to believe they would not have tried for the position in the first place.