Hey MCiccarone,
One way to control the brightness and contrast so your Skylight looks a bit more crisp, is to add a ‘Multiply’ and ‘Power’ node. I would create these as scalar parameters so you can quickly modify and see the changes as a Material Instance to find the correct values.
You can also try using a different Anti-Aliasing method other than Temporal AA, as this can sometimes blur images with the way it is calculated to reduce the stepping effect on images. Try switching to FXAA instead to see if that helps as well.
If you have other questions, let me know and I will do what I can to assist you.
Thanks,