I think the answer to your question, "Will the US help address this?" is "Yes, within the context of its overall strategic goals."

The US strategy depends on maintaining at least, and increasing if possible, the GRP/AFP legitimacy in the eyes of the population. There are signs that is working, esp. in the case of Task Force Zamboanga (where the police and AFP work in teams, and therefore watch each other as well as cooperate). US advisors are always working to improve the professionalism of the AFP and police forces for that reason.

That said, this is and has to be a GRP-led and GRP/AFP "out front" issue. The main thing the US can't do is visibly 'push' them in one direction or another. It has to be done through offering training that they're free to accept or reject. They are accepting it, but it is a gradual process.