In the application for my design I need to mount our chip on a pcb I'm designing. I'm trying to avoid using any of the processor or harness to simplify the support circuitry on the pcb (will just need power <68mW@1.8V>, analog in/out, and dc bias points). Is there any problem with running all of these signals through the 11 io_analog pins and leaving the rest of the ports and power for the processor alone? I'll be including my own esd for these pins.

Sounds fine if everything is fully isolated (including your ESD diodes and their supplies).

Great thanks!