The custom switches might allow a command such as:
When throttle position is above 80% AND landing gear down AND airspeed less than Vmc ( minimum engine failure airspeed) then Compare the RPM of each engine and if any engine is less than 500 RPM of any other engine then announce "Thrust Critical". If airspeed is above Vmc but other items are true then announce "Thrust Warning".
The custom features and open source software, offer capabilities no other brand name radio with proprietary software can offer.