If the problem has not been defined, then the battle is already lost. Whether or not the end product will satisfy the requirements of the problem will not be understood, irrespective of approach. Coming up with an original design will ideally force the student to go through the exercise of defining the problem - this I can understand.
The case of monkey see monkey do is the result of an unfortunate heuristic. It is unfortunate because it undermines the entire point of the student competition: demonstrating engineering skill and creativity through challenge, a training regiment for students to develop the skills to solve ANY problem. However, this requires students to ask some very fundamental questions: What is Formula SAE? Am I supposed to struggle? Why should I participate in Formula SAE? Is this good for me? Is this good for those around me? Apply the next heuristic in avoidance of these questions until the answer is, 'the car that won has this design'.
So yes, I agree we should be careful with monkey-see monkey do. But what can we do about it? I am just a single undergrad student - I can do my best to encourage those on the team to think critically about the decisions they are making. Even that was met with an unforeseen resistance that still remains. How can we give students incentive to challenge themselves and to think critically, rather than taking the quick and easy shortcuts? It will take a driven team with an extraordinary vision to reform the competition such that it encourages and rewards students to think critically to solve problems. This will be no small feat.
Back to the upright design. How does the act of designing the upright help the student develop critical thinking skills such that it augments their engineering education? That might be a bit too much philosophy just to design an upright.