I know the game is called mud runner. I was going to comment on the post that writes out this post but cant find it now.
But I think it would be great if they thick, deep and soupy mud wasn't as plentiful. I think theres should be different levels of thickness as well as different depths of mud. Clay doesn't react how dirt does for example. And a lot of the mud looks like things drove through the mud in every direction possible. When its clear there is just some directions where vehicles wouldnt be driving due to terrain limitations. If that makes sense.
Variety in everything would be a major improvement I believe.