I thought Karamo actually came into his own this season. There seemed to be a lot of young or youngish men who were really lost or hampered in some way and needed a bit of coaching and support: Miss Tamye's son, Skylar to an extent, Sean and most of all Ari. Whereas quite a few of the men last season just needed a bit of a boost to one or two aspects of their lives. I like Karamo more and more; I'm not sure what to make of Ari, but he really tried with him, and what he said about accepting when you've failed and that it's ok was really good advice. However, there's no denying that the visual 'wow' factor of a really good haircut has more immediate impact for the viewer.
I think Sean was just a bit socially awkward and goofy. I don't think he's a freak and it isn't really that weird that a close family friend took him in when his parents couldn't cope - they were hardly going to go into detail about why his parents gave him up but it was most likely Lulu or the foster system. I do think it's sad he hasn't had the socialisation he needs though. Again, I really warmed to Karamo taking him paintballing.
I wasn't crazy about Ari's clothes and grooming post makeover. It was somehow ageing so I was glad he picked out the really youthful clothes for the party.