As I said, the people going in will be a response to people calling the current HMs really dull. Hence why they have gotten three extreme characters (both by what they do and how they act).
Marc could be what we need for all we know, lets see how it pans out. I do feel he will play a villain role because that's what I get from his stuff online.
Ben Frow didn't lie about the whole "show needs a kick up the backside" thing. In the space of 36 hours:
a. Evicting 4 HMs
b. Bringing in 4 new ones
c. No nonsense by ejecting Aaron