The ability to ring up a specific set of knots vice increments will make formation sailing and teamwork much easier. The team can space out in the appropriate formation DDs lead, Cruiser off set BBs etc, allowing for a correctly arranged and organized force arriving at the scene within each others respective "coverage" strengths.
Also, I'd like to hit a single button that fires all my guns -> full salvo. Double clicking leads to jitters shot misplacement. One of the best things I did was move my firing button off my mouse so as not to impact the aim point.