Objective is to make LGV a viable choice, especially for cargo runs in hostile waters. Right now, the only relevant trade ships are the Indiaman and the Traders Brig. The LGV is hardly ever used by anyone. She lacks the hold size of an Indiaman and does not have the upwind speed of a Traders Brig. With the hold size being only 8.5% larger than the Traders Brig, her lack of speed renders her completely useless.
So, I suggest to increase hold size of LGV to 2150 tons (increase of 13%) and reduce the hold size of a Traders Brig to 1450 (reduction of 17%) resulting in a hold size advantage of 48% to make the LGV a relevant trader again.
With 2150 hold size, the LGV is still small compared to an Indiaman, so I'd expect the Indiaman still to be the best option for large hauls in safe waters. But in hostile waters, the larger speed of an LGV might be a factor for her.