While we're in the same vein, Google should remove the dumbed-down content altogether for anyone flagged as a "developer" by their algos, and replace it with man pages and source docs. MDN is a step up, but I usually skip past it, because the actual specification papers are most always better (except for ATOM and OpenLayers!).
Generally I prefer specifications too, but ever since the WHATWG-W3C split, it's become a choice between stuff that isn't yet implemented (WHATWG), and stuff that never was implemented (W3C). At least MDN documents accurately what one major browser supports, and includes compatibility tables for others.
