While I haven't experienced any Yosemite WiFi issues, it looks like some others have: Wifi issues.

Could this be related to the Control:Mac issue you're seeing?

I would guess an update is on the way.


Living room: 818v3, Parasound A23+, Maggie 1.6
A/V room: 861v8, DSP7200SE L/R/C, 4x DSP320 surrounds, ID41 + Roon, UHD722, Prime+PS