I would love a feature that could take a high density mesh file such as an STL and turn it in to a solid, It wouldn't even have to be a T-splines body, just a dumb body that was as close to the original shape as possible.
Right now the limit for Fusion (and solidworks) is 10k triangles to convert from STL to solid. I can upload the same STL to Fusion though, and get a mesh body.
I would love a tool that would convert that high polygon mesh body directly to a solid.