Well said,  I really like your idea on separating jurors from eachother "I think an easy improvement that's available to us already is that each juror/judge decides on their own, with no communication at all with the others" The jury should cast votes like the supreme court would and the majority wins.
I believe AI will do a better job in the long run, but I still do think we need to make many changes that would help people today. Sadly the government doesn't take fixing age old systems well.