In the upcoming new hub world I would like to see semi-hidden "good-to-know" pointers, like mentioning merging meshes and having a low material count on avatars is good for performance or turning off voice prioritization for when listening to a speaker at an event.

New users spend a lot of time in the hub so they're bound to come across them in a fun and more interesting way, rather than having them as loading tips or whatever.

A full list of these pointers would be on the VRC website too somewhere.