Little has changed since I got the Ergodex back in August and I am very pleased with the setup. My left hand stays on the Nostromo most of the time. I only use two layers on the Nostromo and have one key to toggle. I use the rocker pad on the Nostromo for strafing and forward/back. I reach over to the G15 for system ops and to emote or chat but I play solo 99.9% of the time and avoid chat. My right hand stays on the trackball. The Ergodex is used to control the alt character and does a fine job. If I get in a bind or need better control, one key of the Nostromo will switch full control to the alt character and another will switch back to the main. I tried a single key to toggle but didn't like it. I've stopped broadcasting because there is just no need with only two characters on this setup.

Here's a pic of the keyboard setup with a few labeled.

Edit: The big Kensington trackball is only used when Multiplicity won't let me get over to comp 2 for whatever reason.