I haven't tried out the Scarf set yet, but in my experience with the 4 Attacks set, prediction hasn't been a problem, mainly because Facade has great neutral coverage. The Pokemon that can switch into it are all pretty bad switch-ins, because they are OHKOed by the following Close Combat (bulky Rocks/Steels), OHKOed by MEgahorn (Spiritomb), or are unable to OHKO and are taken out by Night Slash (Mismagius, Rotom). I'm not sure how I feel about Heracross' tiering. On the one hand, I like Heracross' presence; having a powerful Pokemon helps make the tier more structured, and I haven't had too many troubles facing him, since I'm pretty much an entirely offensive player. On the other hand, I tried to make these arguments about Gallade in the past, and Gallade was banned for it. However, with Gen V here, I'd rather not argue about this tiering issue, and I'd rather we make the correct decision than the least hypocritical one.