Off hand, it looks like Ford may have addressed the main problem with a plug-in retrofit (hopefully). That is the lack of power with the current electric drive. Like many here, I find it just about impossible to drive in traffic in EV mode. I always end up kicking in the ICE when I accelerate or get anywhere above 30
kph.
My office is only 5-7 km from my home, so a plug-in hybrid with enough electric power to move at a reasonable speed and accelerate from a stop without causing cars to drive over me would be fantastic. I'd only need the ICE on weekends!
Cheers,
rcomeau