@RebeccaWinter9 Elena did that because she was worried about Jenna. She just wanted her to be happy and most importantly alive. Of course I don't think it's okay. Elena, Alaric and Damon definitely overstepped here, no question. I did it for character development. What happens to Jenna while she's gone will teach Elena not to overstep like that again.
I know Marianne wasn't really present in the last couple of chapters but that will change once she's back in Mystic Falls (which will happen next chapter). Then we will focus a bit more on the show plot until after Esther's failed attempt to kill her children after the Ball. After that the story will heavly focus on the Mikaelson brothers trying to jog their mate's memory and making her fall in love with them once again. The whole Alaric alter ego and Elena turning into a vampire stuff (but not like it was done in the show. Esther won't return and take over Rebekah's body) will happen more in the background. We will focus more on the Show plot again when it's time to look for the cure (which will also not be entirely cannon. Marianne's and the twins' presence will heavly influence the outcome of that storyline). Once we reach the end of Season four they will leave Mystic Falls and we'll go completely off cannon. The Originals plot will not happen here. Neither Klaus nor Elijah will have any ties to Hayley. She will be entirely Caroline's problem to deal with. Hope will not be born (at least not from Hayley). Dahlia, Lucien and the de Martels will still become a problem for them to deal with but other than that and a few characters from the show appearing here and there we won't be going into the Originals plot. They won't be going to New Orleans either.