I agree with you Glos Guy, I also have a Tucson PHEV and whilst generally happy with the car, its drive modes could be improved. During the winter, say on short journeys to the supermarket and back, it seems reluctant to go into EV mode until it has warmed up the fuel engine. Which is understandable in a way, but it means the journey is almost over before I can take advantage of cheap EV driving.
What you’ll find its still driving in EV, but the engine is running on high idle between 1100 & 1500rpm to provide cabin heat.