pixelated vectors when precomposed

Hi,
I am running into an issue while attempting to enlarge the scale a precomposed group of vectors. Although all of the layers within the precomp have "quality and sampling" enabled, I am unable to enable it for the precomposed sequence; as a result I get a pixelated graphic.

This specific graphic I am attempting to scale is a rigged character, using DUIK. I'm not sure if that has anything to do with my issue, but I thought it was worth mentioning.

I am running AE CC 15.1.1 on a 2017 Mac Book Pro with OS Sierra version 10.12.6

Thanks for your input!