here are the technical differences I can see.
redone animations (should be easy to do)
improved lighting (can already done in disco)
reworked starscapes to offer much more exitement (easily done in disco)
sharper animations (don't know the difficulty of doing that)
glare (don't know the difficulty of doing that)
actual star textures (don't know the difficulty of doing that)
reworked ship and station textures (EASY!)
ships emitting light (should be easy)
so, since it looks easy to do... why not do at least starscapes and more realistic textures. This should take some time though. but it seems to be worth it!
LIBERTY IS THE STRONGEST OF THEM ALL!!! oh wait, that's 4.84
Now you'll see. I'll predict the future. in 4.86 Gallia will launch a full scale attack on the houses! guess how I know.