Even if you changed immunity to reduced potency, I would be happier than I am right now. As sad as a 5% slow, Slow 2 would be; it would still be better than 0%.
RDM feels very ON/OFF or Binary right now. There is no qualitative reward to be being good at RDM. An enfeeble either lands or it doesn't. You never worry about how potent your enfeebles are because we spend all of our time just finding out whether a mob will even take a debuff or not.