I agree that it wouldn't be good to have Anakin too dark, too often, so that Clone Wars EU portrayal of him doesn't sound better than his TCW portrayal to me in terms of fitting in with the films. If Anakin has moments that are too dark, too often, then the Ep. II Sand People incident ceases to be significant and becomes just the first in a long history of similar incidents. I've said many times that I like TCW Anakin the best because we never got that hero-like figure in the PT that we always imagined he would be from the OT, and TCW is delivering on that character. This couldn't be the case if he were significantly more unstable than S4 has already shown him to be, imo.