mix adjustments when using mix offsets

Hi Richard,
I'm using the mix offset feature quite alot to create a "canvas" consisting of 3 mixes.
setup as follows;
mixes 1,2,3 routed each to an output on a TH2G at 1024x768
all layers routed to mixes 1,2,3
mixes 1 and 3 offest to either side of mix 2
content 3072x768

The problem I have is that there are no seperate colour or intensity controls per mix, the only control I have is on the layer which of course will affect all three. Sometimes I need the flexibility to adjust the level or the colour of one particular output.

Could we please have an intensity master per mix (I know other users have asked for this) and colour fx parameters (as per the live inputs)

Thanks
Paul