I remember once upon a time, guild tasks gave out only souls, glory keys, and gems. And you could play it so that you only got gems and glory keys. Top guilds were earning about 3k glory keys and 2k gems every week. Might be fun to look through that old complaint post.
2.1.5 was when guild statues were introduced and the old guild tasks went away. All complaints were about some change made to valkyrie.