"Good comedies always touch on troubling themes and envisage darker ends than are finally delivered." To what extent is this true of Twelfth Night?

'Good comedies always touch on troubling themes and envisage darker ends than are finally delivered.'
To what extent is this true of Twelfth Night?
It would be hard to argue that the central theme of Twelfth Night is not simply love and its fulfilment and to subsequently view the play as a set of comic capers which lead to this, or simply 'a ripe love comedy with a happy ending'#. The reader/audience is taken on a romp through a make believe land where no one is as they seem and where intrigue and disguise abound. As the fool Feste tells us: '.....Nothing that is so is so.'# To arg…