Yeah, I don't really understand the obsession with having Hayter. I think he went completely of the deep end after Snake Eater. It's like he totally failed to understand that Solid fought against his genetics, but he just played Solid and Naked as having only marginally-different voices. Which was at odds with the way different voice actors were cast as Liquid and Solidus.
Personally, I welcome Sutherland to the role. I see his casting as being representative of being a new direction for the franchise: one that is a little more tightly-plotted, and without being smothered in the self-indulgent philosophy that really let Guns of the Patriots down. I was re-playing Sons of Liberty the other day, and as I was working my way through to President Johnson, I had to marvel at the way his explanation of the Patriots' plans was so poorly-written. Maybe it's just something that was lost in translation, but the damn thing went on forever, repeating itself several times in places. And then the same thing happened when Snake and Otacon described the way the tanker incident was a set-up. That's something that Kojima needs to overcome.