This still sounds to me like trying to turn a loss for us into a win for them. If you were really that sorry, would it kill you to offer this merest of morsals of DLC to us period, rather than just as a way to incentivise us to buy the game at launch?
If ever you must offer something to your consumers as a apology, it mustn't appear to benefit you beyond building good will. It's the same as when Sony offered us some Playstation Plus subscription and some free games as apology for losing our credit card info, a lot of people were insulted that the peace offereing seemed to be just a way for Sony to lul us into the realm of the future purchase, with a taste of Playstation Plus, and some games geared to tempt us towards sequals.