This is one area where Eurorack modules are not so advanced, but the new Mixer from Toppobrillo aims to change that:
Its a voltage controlled stereo mixer with 4 channels,Voltage controlled panning, mute / solo (mutes with VC control in future). One aux send with stereo return. LED VU-meter and pre-master fader headphone amp.
Available soon, price to be set.
NAMM 2016 Kit:
Tascam DR-70D 4 Channel recorders