Glad to hear someone not complaining about the weather for a change!
Personally, I like the way the weather shifts with these changes. Currently, I'm on a two week cruise to AM 47 (just got there) and the longest stretch of foul, rainy weather was about 3-4 days. Of course, it's August of 1940, so I'll have to see what November has in store for me.
So far, my favorite moment with the weather changes was when I was stalking a lone merchant. After I got into a good firing position, I submerged to wait for my prey. When I popped my 'scope to have a look see, the weather had turned from clear skies to overcast with heavy fog, but no rain. I surfaced just in time to see the merchant emerge from the fog about 600 meters away. I had just enough time to fire before he disappeared again into the fog. Scratch one merchant!
One minor point. I'm not sure if I'd call this a mod. I didn't really do anything other than change a couple of numbers in a text file based upon what I've read about the experiences of others on this forum who have tried wrestling with this problem. I wouldn't know a hex file from a hole in the ground! Glad to hear that you like it, though!
If the weather is changing too rapidly for your taste, try WeatherRndInterval=3 instead of WeatherRndInterval=2. I recently changed mine to 3 and I think I like it a little better than 2.