Although I enjoy the game as it is, I do think WGT could alter the weather conditions more. I don't mean the wind levels, but how about a bit of rain, mist or drizzle? The rain would effect the green and fairway speeds, making the game a more varied experience.
While WGT are at it it would be even better if the conditions reflected the "real life" conditions on the course at the time of playing, we are on the internet after all.