> unity gain mixer with 7 inputs and one output just for mixing
> triggers and gates

This sounds to me like you are proposing a 7 input "OR" logic gate
rather than a mixer. Is that correct

I would also like to see the opposite of this offered; a buffered
multiple. Perhaps two single inputs and 3 outputs for each with the
second input "normalled" to the first input.

Cheers,
Adam-V