It is a nice show. The suspense display in it, is thrilling. It shows lots of potentials for a good show that will stay up for a while if Red stays alive and Liz doesn't side with her mom.
The role of Liz Keen is annoyingly annoying. Her quest often leads her to trouble. Whereas Red shows lots of love and concern for her, she takes that for granted and would end up betraying him.
The last episode of season 7 shows how she has decided to take sides with her mother. If she actually does this, many fans will withdraw from watching to the end. Red collapses and Katarina drives him to some place for treatment and this amounts to her personality to be taken as good? She is the evil of the show.
Liz has betrayed Red too many times. And her role is kinda irritating. Though the storyline is based on her, she has repeatedly demonstrated her inability to attract fans to herself. She's at some point dumb and acts like she has lose track of her lines.
If Red dies, then the show ends. If Liz sides with her mom, then the ending of a once brilliant, entertaining and educative show will suck.