Keep in mind that the downgrade is not from Facade-Quick Attack, but from Facade-CC/Knock Off. If you do 3 consecutive battles, the chance of the opponent having a bulky rock or steel type is nearly 100%. And it makes sense, in a tier with Boomburst spammers and plenty of Hurricanes. A +2 knock of will fail to KO things like Aggron,Magcargo,Relicanth,Bastiodon, Regirock,Carracosta and Probobass, with the formers able to tank it even after a decent amount of prior damage. There are even more dangerous checks such as Carbink(resists knock off) and Shuckle(encore+bulky). In order to adapt to this, Facade is replaced with Close Combat. Sure, if the team is built without the rock/steel wall, which is rare, Facade will be more useful. But since rock/steel types are used often, I adapt my Zangoose to this trend in the meta. In conclusion, yes Facade could be more useful in certain situations, but if you're up against these common checks, Close Combat will prove more useful. Thanks for the feedback though, it made me more thoroughly examine my set.