Yes, I know that this will be cheating but maybe limit the tinker panel to colors, different engine color flames, etc. Basically, what I am saying is that they shall add some things in the tinker panel that allows you to make your rockets a bit funkier without cheating like mass scale, price scale etc. One example of using the inker panel is that if you color a fin only 1 side of the fin is actually colored, you can then use the tinker panel to make it so that the color is all over the side of the fins.