I liked how (up until somewhat recently when the new clouds were giving some players problems (I wasn't one of them)) HTC was adding a little more detail/eye-candy for the game almost every major patch in an attempt to make it better.
I wish that path would continue, but there may be some stiff resistance ahead (IE the recent MA clouds).
I hope the clouds to get turned back on eventualy, and then we get some better environmental shadows (off clouds and mountains/hills, and then maybe some better horrizons (no high-alt pixelation on the edges, some sunrises/sunsets/twilight), and then maybe some severe weather (IE: mini fronts that roll randomly thru a sector for ~40-minutes every 4-5 hours), and then etc... I like the slow and steady path, it's gradual and progressive, so if you have a pc/rig that is starting to reach its limits now, you have enough time to save up and upgrade your equipment.