[Paper2d] Issues with sprite quality after TexturePacker and UE import

I’m working out my art pipeline and am having issues with sprite quality. Here’s the workflow:

Create vector animation frames in Autodesk Graphic for iPad and export at 256x256
Pull frames into TexturePacker and export as .paper2dsprites
Import into UE and create a flipbook

By the end of this process, my sprite comes out as heavily aliased (more than the individual images are before the TexturePacker process). My question is, what are my options? I tried exporting at 512x512, but there still was some aliasing. Are there any settings that I’m overlooking? Any better ways to get vectors into UE?

Attached are my TexturePacker and sprite sheet texture settings, and a screenshot of the offending sprite.