Each output channel had its own EQ so you could taylor the frequency response accordingly based on how you wanted to make each channel sound.
That's a very well-thought out and capable little system you came up with, Joe. Pretty much a one-stop shopping answer to all the other options.
My station uses more of the basic approach which I only started implementing in the last couple years. I have a junction box with the necessary terminal strips and jacks attached which works between mic, EQ, stomp-to-talk switch, & transmitter. I hardwired the foot switch into the box but use 1/4" stereo jacks for the rest (Dick's XLR approach would be preferable, just didn't have enough on hand). This allows me to just make up a cable with appropriate connector for the transmitter mic input if used, also any outboard processing, simply by using a stereo plug on the junction box end. You can set up all the mics with a universal 1/4" or XLR plug and have a lot of flexibility this way. In my case, the mic goes into the back of the JoeMeek EQ box and the EQ goes to the junction box. It can be bypassed with a mic in the event of problems or for testing purposes. Change the transmitter jumper and it's ready for another transmitter.