Well, the 14CUX arrived and was installed.
IT'S A CHRISTMAS MIRACLE, THE RIG IS HEALED!!!!
Plugged the new ECU in and hooked up Rovergauge, it immediately began to communicate. Fired right up and idled well. Put the dogs in and we took off and it ran flawlessly. Idle was a bit high, not bad, but a little and i went thru the base idle adjustment procedure twice, but when I fire it up after the initial key on, unplug, key off, wait till click, plug in, key on, unplug, start process and both times I got a very high idle. Maybe the 13CUX system does not like the 13CUX base idle process running a 14CUX ECU. I can live with it.
So what happened, or was happening? I can only presume that the ECU was failing and perhaps the other one was too. Did extended rest reset something? Was it only able to process a limited number of faults (speed transducer, O2's, base idle???) and would go into some extended limp mode? Who knows? For now she's running fine (should be, new plugs, wires, cap, rotor, wires, coil, TPS, O2's, speed transducer, clean MAF, test pipes in lieu of cats, and other assorted special guests).
THANK YOU to all who read, responded, made suggestions, gave it thought and so on. This forum is what brought about the cure and everyone deserves a beer! Come to San Juan Island and I'll buy a round!