There really isn't even any indication of Hydaelyn being good or the Primals being evil. Hell, we don't even know if the aether being drained from the planet would be such a horrible thing. Most of the denizens in ARR simply assume that because they rely on aether so much. I am personally going to wait an more information to be released, either from the Ascians or the Garleans. I feel like the Garlean Empire has some sort of information on the Primals that we don't have, maybe they know the full effects of Primal influence.