We have known this for at least 15 years. Although knowing it doesn't necessarily help.
The met office system works - on the basis that if you don't go flying you won't get struck! It would be interesting to know how much lost flying time was caused by the system, vs how many aircraft would normally have been struck. I suspect the false alarm rate is very high, ie lots of days of non- or restricted flying and hassle to save maybe 1 strike per year. Unless they can make it more reliable I'm not sure it's worth it.