I would love to see a color wheel or palette for the coasters in planet coaster. I know in RCT3 there were very limited options in term of colors that you could choose for your coasters, and I would like to see more customization in this area. The ability to match the colors of specific coasters in real life and recreate them would be very awesome. Also, the option to color specific pieces of track would also be helpful. Something like Top Thrill Dragster which uses alternating white and red track would be much easier to recreate realistically if you had the ability to color individual pieces of track.