Guilt or Innocence -- As I was taught: Lack of proof is not proof of innocence. With that in mind our system of Guilty/not Guilty is, IMHO, inadequate. I would favor a third option: Not Proven. That option would allow for a retrial if the prosecution fails to make it case, or additional evidence turns up later. I know, double indemnity would be a major and reasonable obstacle.
Directed Verdict -- From what I have observed and read of the case, Rittenhouse has a solid case for self-defense. But Jury's can be difficult. A directed verdict would focus all 'blame' from the far left onto one person: The Judge. It would take a very courageous judge to stand up and place that blame on himself.
The Jury -- Judges are usually very good at 'reading' a jury, thus the Judge's decision will hinge on that.
My personal prediction: Hung Jury and no retrial