Simply put, the Brigantine sinks insanely fast and is the easiest to damage of all the ships, due to its length and the fact most of its hull sits below the water line.
The deck is very flat and narrow, combined with the wheel, cannons and sail controls being close together, as well as the ladders being very short. It is not uncommon for someone to quickly climb a ladder and explode on deck with an explosive barrel, killing all three crew members. The chances are when your crew respawns, your Brigantine has sunk.
The solution? Less damage on explosive barrels or a longer sink time for the brigantine.
Any productive thoughts to add to what I have said are very welcome.
