I can understand the masts going down because of cannon fire, but from the experiences I have been having over the last few weeks I find that if I deliver a single keg almost any place on the ship the target ship masts will fall.
In conjunction with the damage that kegs cause I do feel this may need some tuning.
Perhaps make the masts more resilient to the explosive damage and maybe reduce their resilience VS cannon fire.
Why? Explosions in real life can cause a lot of damage, but typically only to a container of some kind; like ships hull.
Where as a large pole like a tree is often stripped of some foliage, but the tree is typically standing unless a very large explosive is placed very very very close, and even then it's not a sure thing.
Perhaps a damage sails mechanic instead of a broken mast mechanic for the kegs, but only if they're detonated on deck.. When the kegs go off under the ship or even at the front of the ship in the water it makes no sense to damage the masts at all; perhaps only if they're already damaged from cannon fire.
Last on my list, what's up with all the fog.. Please ease up on the fog, it's rather out of hand now.. Cool feature but way too frequent and the distance is a little too hazy now.
