Assuming for the moment that you're not yanking our collective chains on that one: What are you basing your opinion that "reasonable suspicion" isn't going to turn into racial profiling when applied to enforcing the AZ law?
I am a lawyer, in fact a prosecuting attorney. This is a fact. Furthermore, the U.S. Constitution and AZ constitutions prohibit the enforcement of state laws on the basis of race, as this violates the Equal Protection Clause of the 14th Amendment and the AZ Constitution. Consequently, unless a court is just desiring to render a decision contrary to long established jurisprudence by the U.S. Supreme Court, then there will not be a ruling which says racial profiling may constitute or does constitute as reasonable suspicion. Now, this is just court review of police conduct.
In my jurisdiction, law enforcement receives legal education from local attorneys, specifically prosecuting attorneys. In doing so, we tell them what the courts have been doing in regards to reasonable suspicion, what factual scenarios the courts have held to constitute as reasonable suspicion, and which factual developments were insufficient to constitute as reasonable suspicion. We have an open dialogue with law enforcement on this issue and they call us to inquire of our opinion quite frequently. It is also worth noting, although hardly necessary, law enforcement are aware of the fact it is never legally justified to stop or detain someone on the basis of race, nationality, ethnicity, religion, gender, or sexual orientation.
We educate our officers and I suspect many other jursidictions do as well. Now, in regards to AZ, the governor has requested, if not mandated, law enforcement receive training and education regarding how to properly enforce this law without racial profiling.