I believe the LiveDatabase is a bit of a hidden gem.
Here is what I believe holds it back:
*Lack of Meta Data.
Let's suppose I want a modern battered brass material--one that is built with the new Octane metal shader. How would I find that or even know if it exists in the db? Many of the materials are older. If there was a date of when the material was added...I'd sure have a better chance of finding it!
Meta-Data could also include a ranking system where users can give a score to a material.
Suppose I wanted to find materials from a particular artist or contributor? I can't currently know.
How about an indicator of materials I've already downloaded?
A checkbox indicating if a material can be tiled or not?
A brief description?
Again...meta data that can be displayed and searched would really help.