User blog comment:ASDFGirl/The Future of Fossils and Archeology: Revival/@comment-2600:387:2:804:0:0:0:74-20170919124024/@comment-25118285-20170919194404

Well, just because we're adding so many animals doesn't mean they're going to spawn at insane rates; I'd assume that the fossils would spawn at the same rate as the fossil ores, with a random chance of each mob to spawn. It won't be that they'll spawn 90 times more often. As for keeping the fossil ore, there is really no logical need; we're getting rid of bio-fossils because there'll be actual fossils for each animal, and all the other drops are either plants or archeology items, which shouldn't really be lumped under one "fossil" ore anyway. Just because it's done its job up until now, doesn't mean it meets our new, more accurate criteria. Hope this helps you understand.