If you think that publishing score is affecting your visibility and that it is impossible to achieve better score for 3DP models, think about that - you're competing against other 3DP models, not against regular 3D models, so as long as you prepare nice descriptions and add enough preview images, you will be totally fine, because no other 3DP model will be able to outscore you ;]
On the other hand, my highest ranked 3DP model has 7.0 score and i think i could easily improve its publishing to 8+ score if i would want to.
Having said that, i completely agree that low ranks for 3DP models and textures should be addressed by the cgt team, because having significant amount of aforementioned products in one's collection, could negatively impact overal score and that would limit one's access to analytics tool, which is unacceptable.