No Hayter. I'm sorry but this is really a big deal. It's not about resisting change but Hayter's voice has that espionage sound to it. Kiefer doesn't and sounds average.
Pretty much this. The issue is that Kiefer just sounds too generic, and too boring. Hayter has a very distinctive voice that actually made a huge part of the Snake character outside of Japan. He is over the top and cartoonish, just like the series. Everyone else is still using their characteristic voices, like Huey for example. Kiefer just sounds too out of place.
To me, changing Hayter's voice was like changing Duke Nukem's voice to make him sound like James Franco.