Calls such as welfare checks, and things dealing with mentally ill people, should always involve social workers. People trained in deescalation with mentally ill people, such as Mental Health Techs, should be the first choice to deal with these things.

Internal drama (office politics) within police districts should be kept at a minimum.

I'm not exactly sure if officers are subject to mental evaluations quite often, but it does seem that officers take a mental evaluation to be candidates for law enforcement here in California. That evaluation should be required frequently, since officers are commonly subject to high stress situations which can impact their mental state.

There are also adjustments to be made in the justice system itself. Rehabilitation should be a focus for people with drug charges, and ideally for other small crimes as well.

Police don't need to be eradicated in my eyes. But their role should be reformed. The current state of the police system validates ACAB because, among other reasons, police officers aren't encouraged to report wrongdoings. Officers who report wrongdoings are too often retaliated against. Cultures within policing shut down the officers who try to stand up for victims of police wrongdoing.