He's saying that making the game too easy will kill the game, and it probably will. Which is why they should have nerfed trading and tried to fix the economy, rather than just buffed everything else to match.
I kind of agree that they should have nerfed trading instead of buffing bounties.
But that's too late now, that's something that should have been done before release, you can't fundamentally change a game like that after release.
However, I don't think it'll kill anything, just for the record.