A key difference is that GoT has revenge fantasy as a huge part of its' plotline.let's see, high caliber movie actor from a beloved fantasy franchise gets cast as one of the leads of an ensemble genre show only to kill him off at the end of the first season... they might be apples and oranges, but I tell you, both are round fruits
Ned Stark is killed, and story arcs are created for his offspring to seek revenge. People keep watching GoT so that they can see hated enemies that killed characters they love also get killed.
If Lorca is removed from the show, they are just taking out a popular character and leaving us with less enjoyable options. There will be no "revenge fantasy" reason to keep us watching.