I loved this show with one exception: the overwhelming use of tobacco products by the lead characters. I find it nauseating to watch. I kept coming back because the stories and the acting were so good, so the only hope I have for the new casting of Brittney is that I hope he is a none smoker in the series.
He seems engaging, though I will certainly miss James Norton. If they had also switched out Robson Green, I probably would not watch anymore.