I like the hand-drawn look for the spaceships too. And with AI the process of 2D animation can be sped up bigly. 3D just looks jarring unless you use an animation style with no lines, like Wind Waker and BotW/TotK do. But the lines are a big part of the appeal of LotGH's spaceship designs, it's supposed to look like concept art for a spaceship that someone wants to actually design and build.

Articulating the charm of the 2D look is difficult I admit, and ultimately it's a matter of taste anyways. I also know that a lot of people will cry about using AI to expedite the 2D animation process, but they can go ahead and cry. The only thing that matters to the vast majority of the audience is if it looks good.