Does the Channel negate a dreadnought's advantage?

Does the Channel's shallow, confined water offset the advantages of dreadnought battleships?

Not by removing their armor advantage, but by forcing close ranges and restricted maneuver where smaller guns, torpedoes, and massed fire become much more lethal.

Dreadnoughts retain their armor advantage, but a fleet action in the Channel would be fought at unusually close range among warships and transports. At those distances, weapons that are less threatening in an open-ocean engagement can penetrate or disable much larger ships, while congestion limits maneuver. Later close-range cruiser attacks on Japanese battlecruisers illustrate the danger. The result would be a confused massacre instead of a clean dreadnought duel.