That’s not really true. I’d say legendary weapons are easier and faster to get in bulk.
You just do a fast simple spiders-only world boss rotation and then go to the nearest dungeon, skip all the content, and go straight to the chests. (some dungeons have up to 5-7 legendary chests so there’s no need to run around the map to open chests one by one.)
Some dungeons have new bosses with skeleton key drops etc.
The only possible “hard” part of the new system is an artificial chokepoint if someone loots the chests before you or jumps you if it’s pvp.