Agree.
The current max. ship slots is 25, right?
So imagine if you wanted to have a good variety of ships spread across your outposts, for ow hunting, for upcoming port battles, trading, or whatever. With multiple dura this task is already kinda hard imo.
If you want to have a backup ship for every ship you're using so if you lose one you don't have to sail back to your crafting base and get a new one done, that'll be hard.
Might want to double the current max ship slots (not sure about the price tags to unlock the last slots though).