Such questioning is far better than sending jurors to deliberations without a clear understanding of the facts. It also helps lawyers know what areas to cover better. The better the issues are covered by all sides, the more likely the jury will reach a rational verdict. While this was apparently a first in Duval County, Carithers did not really break new ground. Judges elsewhere have allowed questions by juries - but only in a few cases, usually civil.
Jurors have the most important role in a trial.
Courts should make their job easier. Enter words describing a concept or keywords.