CAFRedblade
Explorer
From what I've read and understand, there will be things in the "Core" Rules PHB, DMG that are not part of the Basic or Standard gameplay without DM permission.
IE: Kender and Warforged are in the "Core" Rules but are not Core due to setting specifics.
If playing Dragonlance, or Eberron, those races then become Core options. This helps with the I want to play these settings with the Core Rules without waiting years for Setting specific rule books to arrive with those options.
As long as they visibly present material as optional, that'll go along way to helping DM's craft their gameplay/gameworlds.
IE: Kender and Warforged are in the "Core" Rules but are not Core due to setting specifics.
If playing Dragonlance, or Eberron, those races then become Core options. This helps with the I want to play these settings with the Core Rules without waiting years for Setting specific rule books to arrive with those options.
As long as they visibly present material as optional, that'll go along way to helping DM's craft their gameplay/gameworlds.