Karo is one of my fav fighters, so this is a tough post i am going to make. I don't think he can physically make the cut to 155 and be the same fighter he is at 170. That being said he is def a top 3-5 170 lb fighter. Problem is I don't think he can beat the top 2. IMO those top two are GSP and BJ Penn. Yeah Serra has the belt and Hughes will probably beat him when they fight. I don't think either of those guys can beat BJ or GSP on a day to day basis. I know they have in the past but I consider those fights abberations.
I see Karo as maybe getting a shot just so the UFC can say they gave it to him. He is a warrior and will always put on a great show so the UFC will not let him go anytime soon. He will make great money being the guy that dismantles the up and comers that are trying to make a name for themselves or an awesome mid-card draw that completes a card because all the hard core fans know what he brings to the table.
"Casualties many; Percentage of dead not known; Combat efficiency; we are winning."
(Colonel David M. Shoup, USMC, Tarawa, 21 November 1943.)