Deadeye made a lot of older ships like Roma playable again. Once it's gone, we're back to seeing endless Slava/ Thunderer divisions.
Removing dead eye is going to set back more than half the battleships in the game, kill the entire Italian BB line, which is extremely deadeye dependent.
Already hard to kill cruisers like Petropavlovsk will become even stronger as people land less shells. Ships like Austin will no longer need to worry as much. In short, removing deadeye will open pandora's box of harder to hit cruisers.
This player fit over some marginal increase of accuracy shows how inflexible people are to game changes, and I bet you're going to miss Deadeye like crazy once you're knee deep in hybrid ships and european airstrike cruisers.
Mark my words, people will be fondly remembering the greatness of deadeye in only a matter of time.