I appreciate you consider it key but that several others are disagreeing whether something was successful is not them simply moping it was successful but not enough :). Keep in mind this all started out with this being the only way to get people on other browsers like how it had already worked in the EU so that's going to have steered more disagreement in the conversation than you might expect.
I think the browser ballot style thing may have hurt more than it helped in the long run. E.g. users clicking things they don't understand during the initial setup of their computer (while a whole lot of other things they don't really deal with often are going on too) may have actually resulted in some extra short term download hits that immediately scared those users away from spending time trying other browsers out once they realize what their selection meant in terms of change. How many users that clicked on Maxthon and were confused/disappointed with a (then) Trident based browser that wasn't quite IE? Hard to say but the data isn't jumping out to show the opposite.
I agree it would take more than one approach to restore the balance but I disagree that means all approaches are inherently helpful to roll out, let alone inherently key. The ballot initiative didn't result in any measurable change, even against the tide when compared to other regions, and simultaneously focuses both people and discussion away from major issues like the tricks dominant players actually use to gain market share. E.g. Microsoft had IE (and later Edge) bundled as the default choice after the ballot and share continued to decline up until they used these other working tactics which have resulted in it becoming the 2nd most used desktop browser again.