This touches on a question to which I'd love to know the answer: what would happen if those charged with crimes could not waive their right to a speedy trial and plea deals were disallowed?
For the accused: those with low resources would go to trial with less time to mount a defense. Disallowing plea deals would remove the possibility of coercing lower-severity conviction pleas.
For the prosecutor: less time to mount a prosecution.
Benefits to courts and jails: much cleaner and more open dockets, jails cleared out much quicker.
Presumably this would lead to more rational charges - fewer charges and charges that were higher priority and easier to prove.
In the short term, prosecutors would have no choice but to drop a huge number of charges as they would be overwhelmed.
EDIT: here's an interesting data point where it looks like NYC passed a law that required prosecutors to have all evidence ready prior to the speedy trial date. It seems like it drove a lot of dismissals of low level stuff:
https://datacollaborativeforjustice.org/wp-content/uploads/2...