Or rather, I do have ideas, but they do require substantial restructuring. E.g.:
1) Strict, in-person (no exceptions), electronics-free exams with written and oral portion.
2) Transition to guided independent learning: students are given written materials and recommended exercises to study. They are shown how to use AI assistants productively. Instead of lectures, there are scheduled discussions, where students can ask questions and listen to additional explanations from the lecturer. They can also seek feedback for completed exercises. However, none of this contributes to grades in any way.
With such an incentive realignment, I think it's possible that higher education could be salvaged. But... apart from general institutional inertia, there is also the political angle standing in the way. Everybody needs a degree in the "developed economy", and the above changes are basically the opposite of the nobody left behind policy that enables half the population to attain one...