Change of qualified immunity would indeed be a huge step. It should be the courts that kill this thing. SCOTUS invented qualified immunity out of whole cloth in 1967, so it's only appropriate that they clean up their mess:
https://theappeal.org/the-lab/explainers/qualified-immunity-explained/
It should be said that civil lawsuits are really thin gruel when it comes to dealing with police violence. It would still be a huge double standard if cops can commit acts of criminal violence and would only be looking at civil, not criminal, sanctions. The real "just" solution would be
criminal prosecution for examples of police brutality or other civil rights violations, but that is a huge ask where DAs have close relationships with the police and bootlicker politics reign supreme. There's some movement on that front, with the DOJ making a big show of investigating a few high profile cases of police brutality, but it's hard to imagine this standard will apply to more routine, low-profile examples of police criminal violence.
At least with civil lawsuits, the adversarial system of the court and the potential for big payoffs means there's some impetus for someone to actually take up a civil rights violation case, where local DAs only see negatives and political risk.