Anti-Aliased or smoothed MFD & HUD displays. MFDs are pretty hard to read when you’re using a large FOV because of how blocky the text and lines get. Mip-mapping the displays would also be useful; the shimmering that results from the full MFD resolution being minified is rather distracting.
Trees being properly alpha tested in in BHOT/WHOT TGP views. Currently trees only look proper in CCD mode, in the IR modes they’re rectangular planes.