the past days I've been implementing support for compressed Textures to AndEngine. During that change some refactoring was necessary. For you nothing will change besides a couple of renaming with anything that deals with Textures.
I.e. what was previously simply called 'Texture' is now called BitmapTextureAtlas, what represents its actual purpose a lot better.
On the 'new feature' front there are now ETC1Textures and PVRTextures (Also PVRGZTextures. Soon PVRCCZTextures), which have a few benefits, when compared to PNGs.
More on all that tomorrow.