Hello Lon. Here looking for 2023 answers myself. A bit of a sorting process just filtering out critical thinkers from fan boys.
Some thoughts, and let's call then conjecture for now, that might help (and might already be obvious to you).
1) 14F? Yea, that's a bit brisk.
2) Most battery technologies, and I don't know exactly what this is using, don't handle cold well. With less than 18KW available when warm, a cold PHEV battery can't output much power without hurting itself. Was I you I'd be asking these things:
A: Does the battery system have a pre-conditioning capability adequate to avoid this limitation?
B: Assuming so, can said conditioning operate while plugged in?
C: Is the vehicle capable of pre-conditioning, both battery and cabin, exclusively via EVSE, or might it start the ICE (a bad thing in a garaged vehicle).
D: At what ambient temperature is battery output restrictions lifted? (I want to say it's 40F for the Pacifica PHEV, as an example, but I don't remember anymore).
E: Is there a known worst-case period of time battery pre-condition is required?
F: Are these decisions based on ambient temperature or battery temperature?
If not obvious my thought is your issue is largely driven by a somewhat less common: An attempt to be used unexpectedly, literally frozen, and undocked. Had it been "docked" and pre-conditioned most PHEV"s would have been fine. Nor is there much of an answer given today's battery tech. It's my understanding solid state batteries perform much better at either temperature extreme so there is hope for the future.
This one? Depends on answers to above,