A few years back, a group of 15 fantasy owners did an all-time draft with a minimum of 1,500 innings pitched while requiring at least two relief pitchers (30 appearances in relief needed to qualify). Each team had to draft 14 hitters and nine pitchers with standard 5x5 Roto rules applying.
This draft is by far the purest example of the player pool as all owners had to research the player pool, plus every owner had no idea of the targeted goals in any category. There were plenty of draft mistakes due to not knowing the final destination and faulty game planning.