Besides my initial (and mild!) annoyance about above proposal, I do agree with @FedericoPoloni that meanwhile there are already rather too many math related proposals floating around on area15 (assuming this was the intent). But especially the math ed seems useful and justified to me (it should not be mere coincidence that it is doing a lot better than all others, while also some others do alright).

Also this proposal the actual math ed one is doing exceptionally well by area51 standards AFAIK. And not only does it already have more than 70percent of the necessary commits (better sign up now if you want to be part of private beta!) but more iportantly it seems to attract some commiters that are professionals in math ed yet neither on math.SE nor MO (nor on network, though some are).