The expertise grinding for fresh 60s and returning players is to harsh to retain player attention. I personally have everything at 600+ expertise, but I was one of the original players of the game, so I was able to experience it along with everyone else. Todays New World expertise grind feels lonely and grindy as for returnies and fresh 60s and will turn away a large portion of players.
So I would like to suggest the starting expertise to be changed to 550 to 580 range instead of starting at 500 or to fundamentally change the expertise system. Personally I think the umbral shards are fine as they are, but everything else needs to be reassessed.