SNS3Guppy, sound advice
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I fully agree that the deicing is a get-out-of-jail-free-card.
Crossing fronts in IMC is where I have seen really rapid acculumations (centimetres in seconds) which I suppose has been freezing rain (looks like sleet from inside the cockpit until you lose forward vision). This is almost always in or around moderate turbulence and I am careful to not allow the aircraft to accelerate while descending to get rid of the ice but equally try to keep the speed from dropping too low in order to avoid tail stall. I think these are about the most challenging flight conditions that I have encountered.
Ice scares me and I do my best to avoid it, no deicing system can handle bad icing.
SB