I played through Rockman ZX 4 times, bought an original version. And as expected, the us version is crap. Though I don't really care as I live in Japan, but still it irritates me as I'm a big Rockman fan.
Here we go.
All voices are cut as expected, it really annoys me to listen to the sound of wind or smth. Original voice acting was INCREDIBLY good, all voices were very emotional (appropriately, of course). Anime scenes are subbed, coa were lazy to remove voices from them.
The translation itself is really poor. Many things are not mentioned at all, i.e. Jiruwe and Van/Eeru were working at Hakobiya Express, now they're just a delivery service. Serpan Company became Slither Inc, though the boss of it is still named Serpent, strange. Actually, almost all sentences are made much simpler, like in the original Model X says "Is there a need for a reason to save human's life?", now he says simply "Do I need a reason to help people?", looks ugly to me. And some typos here and there. And the most famous phrase (was seen at some promo-videos) is still there: "Brave? Me? Not hardly." I bet, soon it will be more popular than "All your base are belong to us". So, the effort which coa have put in the us version is very very small. They wanted easy money.
So, "for great justice", crapcom of america! go on!