Concerning the use of "phase 2", I clearly remember someone here telling "phase 1 was basically GW first 3 years plan FOR AoS (so more or less decided and planned before AoS launch).
And that in the same way, "phase 2" is GW next 3 years plan with all what have been designed (rulewise, lorewise, factionwise) during the previous phase.
Beyond the refered comment written some monthes ago, this exactly how I interpret a "phase 2" in that wargame context.