I wish they hadn't decided that because Lorwyn was poorly received that they can't do lighthearted stuff anymore. It's the block I most regret missing out on. Plus, it really has been a long time since we've done elves, goblins, merfolks, etc. I know they were played out at one point, but we're already returning to Zendikar, so I feel enough time has passed. Plus, considering how most of the new influx came in post Lorwyn, there really is no telling of lighthearted can work. I imagine it would be well positioned after yet another set revolving around world ending wars.