Johnny,
Not entirely sure I comprehend your question, espcecially since they are design competitions. I have submitted similar routings, always with the disclaimer that I need wiggle room once I study the site as much as it deserves. In fact, I am under contract for one now, where they have added a structure since the competition, the true base information shows some property changes, and oh yes, there is a sanitary sewer line that was never properly located....
So, any unknown condition can change a routing plan. Also in the real world, safety concerns would change it, making you bail out on some potentially great holes.
Lastly, I have always struggled with using a natural hole that is a bit too far a walk/or ride from green to next tee. I have a lot of courses where I chose the natural hole, but also some where I spend more money in grading to put the tee near the previous green, even if slightly less natural.