If anyone is playing on PC, there is a way to use a setting provided by Bethesda hidden from the main graphics settings that makes Tree shadows more realistic. Go to the SkyrimPrefs.ini in your "Documents->My Games->Skyrim" folder, make sure the permissions for all users is set to unrestricted/full, then open up the .ini and go to
Change the 0 to 1 in both.
See the difference here: http://www.geforce.com/optimize/guides/the-elder-scrolls-v-s kyrim-tweak-guide#15 on ini tweaks part 2, near the bottom.
So far the game is still amazing after 140 hours. I still have the Civil War, Dark Brotherhood, and Dawnguard quest lines to do.