As eye goes, yes, it impacts walks most significantly, but using the same manner of comparison as described above, in plate appearances that don't end in a walk, the player with the higher eye rating tends to make contact more consistently than the player with the lower rating. Think about it in real-life terms --
This is what I'm saying. We know Eye directly affects if the at bat will end in a walk. However, if it ends in an out or a ball in play, I do not believe eye helps. Maybe in real life, but not the game.
So basically you are proposing that;
1. a batter with good eye swings at less pitches outside the strike zone, and therefore produces a better chance of contact per at bat. (however i believe contact covers this entire assumption)
2. a batter's ability to contact isn't fully based on the contact stat but a combination. I.e. ability to hit would be hypothetically contact + (0.1)Eye 0 contact. That's assuming eye has 10% input.
I'm just asking if this is known or not since I'm new to the game.