I dont think people saying that they knew it all along and its better than paying 2$ per song are wrong though. Personal attacks and insults yeah, extremely out of hand. I dont see the evil on pointing out that it has been known since several months ago, and that it isn't that terrible of a system unless you play in a specific way.
I ain't buying it because I'm a rocksmith convert now, but I would definitely be interested on it otherwise, having a library of 250 songs and that grows overtime, even with some limitations , would be great for me as a casual GH player. I dont think it's really a "evil" system. The prices of the micro-transactions seem a bit too ridiculous, but for the ones playing without MTs the advantages outweigh the disadvantages, at least for me that is.