Do you get the pre-order bonuses for Warlords of New York such as the Tactical response pack when playing the game using Uplay+? Or is that something that comes with the stand alone purchase only?
You won't get the level 30 boost but you will receive other early purchase bonuses such as cosmetics.
Also as you will probably understand, Warlords of New York will activate on March 3rd if you get it through Uplay+.