My favorite design issue with those: capacitive burner controls on the cooking surface mean you can spill something on them and be unable to turn the heat off to clean the thing keeping you from turning the heat off.
Have you encountered any that work like this? In my small sample (n~5, Europe), all capacitive cooktops turn off whenever you spill something on the controls.
Which, while better than buning your house down, is still needlessly annoying.
What I really want is for the controls to not be on the cooking surface at all but that only seems to be available for stovetop + oven combinations which have their own annoying limitations.