Captain America is SUPPOSED to be highly visible! He’s a flashing neon sign on the battlefield shouting “Here I am, you Ratzis! Take your best shot!”
When Captain America busts your bunker, you KNOW it’s him. He’s not a “secret weapon”, he’s a symbol, an INSPIRATION.
I’m not being facetious or sarcastic. Cap is the brash, straight-talking, straight-shooting, can-do America we were (or thought we were) in the 1940’s. If they don’t make him what he was SUPPOSED to be in WWII, then they lose the culture-shock of his transposition into the post-Vietnam, post-Watergate, push-button warfare culture of today.