Morning Nick
In fairness to HC, the 225/725 does have a certified blade deice system (it was developed initially for the military combat SAR 725 variant) and the French have reasonable blade deice experience with the AS332L system, which does work. The decision whether to equip the 225 with blade deice for North Sea operations, instead of using the limited icing clearance, has basically (and unfortunately) become a commercial one, weighing the number of days potentially lost due to icing (say a week or two per year maximum) against the lost payload from the weight of the system (around 2.5 passengers) for the other 50 or 51 weeks of the year. Your protege, of course, comes only with a full icing clearance and we just take the weight hit, but then (I think) we are safer in the winter because we aren't always worried about the 500 feet of positive air and whether or not the freezing level will come down in that shower we can't actually see too well on the radar. But that's my view.