Regarding the draft pool/feeder league question, it should be pointed out that if you take the rosters as Cubby released them and add feeder leagues and players at the beginning, it messes up his draft pool. You end up with 960 players instead of 900, and about 80 of the players in the pool are fictional, so it clearly replaces some of the players he put in with fictional ones.
The way around this is to wait until after the first season, then add the feeder leagues. Then you get your 900 Cubby created players in the first year, and 900 game created players in future years.