I watch this show ever since it premiered, but, the past few seasons it's just been getting weaker with a not so good cast and characters you just couldn't care less if they died.
Elena was never my favorite at the show, but with her gone I'm afraid the show's quality will take a plunge for the worst. By now I'm just afraid to say that they should have bagged it while they were on top.
I like Caroline, but let's be honest: the show probably won't last much with her as the main and half of the original cast gone. They should have just written her off to the Originals, where she could actually have a story that serves her.