I think so, and in some states, they can.
No trials would do on for eternity costing tax payers even more money.
We shouldn't have jurors decide any court cases. This isn't 1795.
No. The arguments are laid out and presented according to the law. What is allowed into evidence is not for them to decide. Their job is strictly to determine guilt/innocence or percent responsible.
Absolutely. The current American Injustice System (AIS) has not even pretended to render justice in over a century. All they ever even claim to decide is which lieyer presented the best case.
The jury, not the lieyers should be in charge of the trial. The jury, not the lieyers should decide what evidence to consider and what not to consider. The jury, and not the lieyers should be able to tell the lieyers (including the "judge") to STFU and sit down.