Three reforms that would be more effective than adding a ‘None of the above’ option to ballot papers

Should voters be allowed to select ‘None of the above’ at elections, as proposed recently on Democratic Audit? In this post, Richard Berry argues that this would represent only a superficial change to the electoral process. He suggests that changing the electoral system, introducing primaries and providing better support for candidates would be more effective ways of achieving the aims of the NOTA campaign.