It creates a class system. Your either a LEO or your not. it also complete destroys the rights of states to remain seprate and have thier own laws. You realize that you could be a LEO in one state, yet be DQ from being one in another, let alone getting a CCW. If all states had the same standard for issuing ccws it would not be a prob. Since that is not the case, there is one.
Example utah will give yuo a CCW even if you have a minor drug conviction, many states that will DQ you. Recently wy made a stink about that( and rightfully so) so they droped UTs permits recipt... then put it back, then took it away again... now its being looked at, so who knows where it will end up.