They already have a Destroyer, and a pretty one at that, I think an LC is pushing that niche a bit. Frigates (think heavy gunboat) however are quite rare, and this could be it.
Keep in mind that it's very likely none of my models would even work in FL, I'm just trying to get used to designing stuff again so I'm making a lot of different models.
Once I get better at it, I'll start looking into making actual ships.
In regards to hitboxes, make your own. I was fiddling around on holiday and managed to get them working after a day or so. The visual how to guide is a godsend.
In regards to the model, very good looking. Catamarans always seemed to look sleeker and faster than single hulled ships.