I think developing infrastructure with the express goal of evading law enforcement* _is_ very shady, and then proof that they did just that is indeed proof that Uber is shady. I agree that there are other reasons beyond their dedicated law-avoidance infrastructure to consider Uber a shady company, but this leak alone is certainly enough _proof_ to label them as shady.

* even if it is simply by adapting pre existing infrastructure created for a benign purpose