Moonlight follows Mick St. John, an immortal vampire and private investigator and his struggle to exist after he was bitten 60 years ago by his vampire bride
Of course, what would the show be if the hottie didn't get the girl of his dreams. I still don't know about Coraline but if she does, I think it will be too late. I bet Mick and Beth will be together by then, hopefully.
Coraline will be back...Mick is a good man/Vamp and is driven to save others.. it is part of his process to maintain is humanity....Unfortunately.. Coraline has a hold on him.. like a bad addicition...and hey it makes for a great storyline...
I cannot picture the future with Mick as human, he just has to be a vampire. Maybe he will get with Beth, or at least they will give it a try. If Coraline is back, it will be to ruin Mick's happiness. Definately, I hope that the effect of the antidote Coraline gave Mick was temporary.
I don't think Mick should stay human, you are right, it would ruin the show, and I think Beth and Mick will get together before season 2. And even if Coraline comes back, that wouldn't stop Mick from getting Beth.