New players should not be given special treatment for world events, emergent events, or pvp. They need encouragement to get good before they are able to do such things.
New players get voyages and emergent skeleton ships to test them
But emergent version of skeleton forts, ashen garrison, kraken, ancient megladons, grand boars, skeleton lords, skeleton fleets, flameheart ghost fleet, ashen winds, fort of fortune, reaper forts. All these should be always galleon level.
Raids should be based in crew size though since its a good way to test your skill and is naturally a lesser version.
Emergent world events and threats (excluding skeleton ships and normal megladons)should be true challenge with bountiful loot pool.
