Where exactly does Alex suggest that? They straight up said in the announcement trailer that Kiefer Sutherland is doing facial capture for Snake in addition to doing the voice, I think the way it's going to work is the full body motion capture is done in Japan, and then the facial capture is done by the Japanese actor while doing voice work for the Japanese version, and the American actor while doing voice work for the American version.
I feel like the amount of money you'd have to spend to do double facial capture for different languages wouldn't be worth it.
Why would you feel the need to grind 6 hours for a skin? I get doing that for a weapon or shield but you barely see the outfits. I will agree that some of the weapon drops are bullshit, but at no point are you ever hindered from finishing the game because you didn't have a particular weapon.