Adding the highest and lowest point of elevation will be a great addition without much effect in the aiming mechanic as it is right now. And i really do like and enjoy the current mechanic, because it is a compromise of easy to use (with the automatic elevation compensation while shooting) and skill / experience (in ranging and keeping track of that spot). If it will become even more simplistic and easier, skill an experience will get neglected too much - welcome Naval Arcade Action. Don't get me wrong, i do not have perfect gunnery nor sailing skills, but i like good long range shots to be difficult. Combat will be much more rewarding then.