ctrl room speaker matrix

hi
i would love to see a matrix type switch in the control room
for instance
i have three sets of speakers plus a sub
ABCD (D BEING THE SUB)
would love to have A+B or C+a+b or a+b+c+d and so on -
without having to use the surround config.
i love the ctrl room and this would be a super augmentation :smiley: