Do Remnants keep their Rites, Attunements, and resonances?
Yes to Rites and Attunements (including anything they got for being Word-bound!) and no to resonances. Resonances are part of a celestials’ innate nature . . . something that is blasted out of Remnants. Rites and Attunements, on the other hand, can be granted to anyone and so are retained. Few remnants have the coherent force of Will to make use of what they still have left, however.