Tides of War, a balance mod

[Mardoc]

Naval Mechanics
“Naval Initiative” mechanic: Naval units that attack with their first movement point from a water tile get +15% attack.
New Naval Promo: Vigilance I. +20% defense.
New Naval Promo: Vigilance II. Req. Vig I. +25% defense.

I don't understand the purpose of this. It looks like these mechanics push in opposite directions and end up just about where we are now - except that you need to spend some naval XP to get there.