This is ridiculous. I can remember countless bouts of Smash Bros. that my brother and I played, watching our coin reward after each and every match, just for the hope of spending those coins on trophies. Stickers are another level of that sort of reward system. AND one of my favorite moments in arcade mode was the "hit the trophy into the cone" minidame. It always got my heart racing a little bit faster. This reward system will increase the appeal of playing smash bros. again and again. I'm loving it.
I had a friend who referred to Katamari Damacy as gamer crack. That's what Smash Bros. is looking like to me.
...Geez, stop whining you puffy, status quo, hardcore-minded gamers. Don't like it? Fine. But don't belittle a feature just because you want to get to pwning newbs as fast as possible.