Nothing new in Coronation Street airing dark and violent storylines. Characters like Alan Bradley too were renowned for terrorising the street with violence. Connor Mcintyre has done a brilliant job of playing evil Pat. If his portrayal makes the viewers really despise him, then he is playing his part to perfection. There's other stuff too, such as Norris antics in the cabin and Rob discovering he has testicular cancer, but if the show only featured people sitting around drinking tea and talking about the weather, that would be so dull it would generate no viewers interest at all.