Richard,
in addition to an intensity sub master on each mix, it would be good to be able to assign a user definable curve to each mix.

For instance I currently have 9 domestic CRT tv's each with a mix feeding to them. When I spread an image over all of them and fade it up, the fade across all TVs is different.

Currently I'm having to use 9 layers set to "use layer mix" and set curves on each layer using my console.

If I was able to set a curve on the mix in catalyst this would make life easier.

Paul