Agreed, and there's nothing wrong with a judiciary being conservative, particularly since they're unelected and should not act in a manner which legislates. In a control theory sense, the judiciary is an example of feedback, which more naturally lends itself to the "conservative" mindset with its focus on refinement rather than expansion.

Anyone who thinks the SC shall be a beacon of impartiality doesn't understand that government is inherently political, the SC notwithstanding. Each Justice will sit on the bench with a particular lens. In that sense, the SC is most just when each Justice sees the world a bit differently with a distortion towards the legal documents themselves. I expect the expansion of seats will decrease a focus on legal documents and focus more on expanding the objectives of a particularly political organization, which abuses the judiciary.