An additional message wouldn't make much sense, since users already know Deicing is available, since they got the request from the menu.
The easiest solution would be we would add an additional L: variable you could check, to know if deicing is available or, you can just do the same calculation we do, which is:
- Temperature must be below 8°C
AND
- Dew point must be within 2°C of Temperature (OR higher) OR It's raining/snowing
I'm going to add a custom variable anyway, which will appear in the next Live Update update, named:
FSDT_Deicing_Available
With a value of 1 or 0, depending on the result of the above calculation, I think it's much easier this way, and will continue to work even in case we'll ever change the logic, even slightly.