That was in simpler times, when we had no track central and the only way to play each other's tracks was to add them to your friends list.
The 100 friend limitation didn't help either

Although track central was a god-send in evo, I can't help be think that having things the way they were in HD was the reason for the Trials community to be so much better than others.
I stand by what I said about customs in Fusion's DLC, in many ways it can't be done. Even picking well known builders isn't exactly fair now that I think about it.