Didn't a dev post mention that they were going to implement this system first, see how it goes, balance it, then keep it in mind as they add new enfeebling spells for RDM later?

My point is it might be too quick to judge if this will eventually give RDM a place or not. It will depend what the new enfeebles are. To me those are what really matter. The problem is, it takes so long to add anything new that I probably won't care anymore by the time they do.