In the update, Rockstar made changes to the collectible spots to make them less predictable. Unlike a cycle change which we can update easily daily, this is a more complicated change that prevents anyone from using a map to rush to a specific spot and gather a specific collectible they need. In other words, what item you get from a spot will be completely random with no way to tell which item you're going to get, other than the loot tables.
This change has been made for Arrowheads, Coins, most Jewelry, some Heirlooms and the new Fossil sets. These being the best sets in terms of rewards is annoying, but also probably the reason why the changed the Collector role to now be this way.