The drop rate for the vanilla seeds needs to be looked at. Was just on Origin in the Exodus dungeon for almost an hour and a half killing Exodus Minions and Overseers and a few controllers here and there and got absolutely no seeds at all. And this was with 1075 luck on the suit (forgot to hit the luck statue before going). I also tried on TC the first day of the publish and killed stuff in the dungeon (mostly minions) for about an hour and never got one then either.