Although Shakespeare's work on adapting traditional structures of tragic theatre to his literary needs was innovative, this is not unique to his tragedies. His comedic plays are also structurally challenging, and unlike ancient comedies, which are often either bawdy or openly political.
Shakespeare introduces significant elements of identity, wordplay, and emotional complexity, which weren't often employed before. His tragedies attracted attention because, unlike comedy and history plays, tragedy before Shakespeare had a too rigid and distinct structure to which any alterations were immediately evident. His tragedies gained attention because of his unique characters, wordplay, and emotional complexity, not because of the tragedic element.