Another pointless crusade. Aren't there many ways you could make it safer still? Wouldn't some of those be really dumb because they would prevent many people from accessing the add on?
How many people are you making more secure? Close to no one because 98% of Firefox https everywhere users have some other add on from AMO. Weigh that against the many thousands more that might be experiencing the benefits of your add on if it were hosted where 99% of add ons people use are hosted.