What is the author's style in The Iceman Cometh by Eugene O'Neill?

A recurring criticism of The Iceman Cometh is that, at nearly four hours running time, the play is simply too long. This begs the question: Is it proper to fault a play for its length? Such a criticism may seem petty and is rarely leveled at novels or poems. It is this sort of criticism, in fact, that brings into relief an important difference between drama and other forms of literature. Unlike other genres, a written drama is not the play's finished form. The final work is the production (resulting from the work of actors, directors, set dressers, and others involved with the staging) that emerges from the text.