I just had a thought, seige battles in this era were relatively a lot quicker and clean affair than compared to the medieval era were they not? I mean, trying to starve your opponent out, blockading the city or taking walls etc all was reduced due the heavy use of cannons is it not? Infact on the frontier it were forts which were besieged and taken swiftly.............what if it is decided to do away with seige battles all togather and just focus on army vs army or ship vs ship?
After all they did say seige battles will have reduced importance......