Now that the CoronaSun and Bloom and glare where revamped, I find myself using them more and more. Here are a couple of things that I believe would be a good additions
1. A real position visualization in the viewport on where the sun will be at infinite distance.
The sun helper is nice and practical, but a helper in the viewport will make precise positioning even easier.
Something like this.
2. Real sun size (maybe this is the case already)
The current sun scale seems a little subjective (1, 2, 3...) 1 seems a little small compared to the real sun size in my opinion, but not sure if 1 corresponds to the real-world sun. In case it doesn't a "real-world size" checkbox would be nice.