@Pierre,
Stereo EQ is not something I plan to do in a channel module at the moment although a dedicated 6U stereo EQ might worth looking at. Switches are the big issue because you need twice as many decks. It is hard enough getting all the tracks out from a two deck Grayhill - I dread to think about doing it for a 4 deck. An alternative is to do an all stepped version of one of the current EQs where the pots as well as the frequencies are stepped. You could put two of these side by side in a box and use then as two mon or one stereo EQ. The stepped controls would ensure they were well matched. Someone has already done this with the Helios EQ to make a stereo mastering version. That is definitely something that could be done in a 6U box.
I plan to allow the transformer to be wired so you can change the ratio with links or jumpers but also to allow it to be connected to OUT1 or to OUT2. Set to OUT1 you can do a pre EQ insert and use the extra input transformer to unbalance the signal on the way back in.
A dedicated module just for routing is definitely the way I am thinking. More about that in the nest blog post. The 6U module is now much more like a traditional Neve channel amp - balanced in and balanced out. No fader, just mic pre and EQ. In Neve consoles, routing was always done is a separate module. I tried to avoid that in the EXTube Mixer because it is more expensive than including routing inside the channel module. However, routing inside the channel module is rather limited so for anything more ambitious than two buses and two AUXes you would need an external routing module.
Of course, with a separate routing module, mounted below the channel module, the wiring to the fader is much shorter so it solves that problem too. A dedicated routing modules could have a completely different backplane.
Cheers
Ian
