Samson did indeed have a full head of hair, although perhaps not so many locks as to be "redundant."
It is interesting to consider where the boundaries between a "reading" and "performance" begin and end. This Samson was not "staged," but gestures, expressions, reactions from the chorus, etc. often blurred the lines. Unlike some readings, this had clearly been rehearsed and there was clear direction at some points.
While teaching SA, I might consider having my students read portions of the drama to consider what interpretive choices they might make in the process.