I agree. Sharing grids could motivate us to race more. Manually adding opponents become tiresome quickly.
I really have a few easy ones (made of car packs) and one "trackday" that I use when I want to drive but not race

I can share them if you guys want anyway.
Grids could be made by BoPing cars from different modders also. That's an idea I have but haven't try it.
I remember your project. It's ambitious as AC mods are too fragmented to compile into one category.
Technically I know how to download as well but I won't install any software. Once I tried finding methods to bypass software just so I can help with rehosting them for this forum. Unfortunately they patched every hole I could find.
Maybe the software can be installed on VM for privacy reasons but I didn't bother with it.
I imagined you clicking and typing furiously, working against the whole country of Japan just to get some AC mods