It's f.... Corsair policy marketing that's why they do not never release K70, K95 etc with MX Silent switches. Strafe released 2 years ago and still any other their keyboard do not have this switches, so people stop having hope. I hear since 2 years same worlds "I am not able to talk about products that have not been released yet" bla bla bla :). We can forget about MX Silent switches in K series.
Jutst buy Strafe RGB with MX Silent switches, it's even better than K70 with this easy to scratch and fingerprint dust magnet metal, only downside it's no multimedia keys and volume scroll.