A no good answer. Twitter is the least bad place. hope for new mechanisms for constructive negative critique.
vis critique is hard because so much of field is made up of vis freelancers whose personal brands are very closely identified with their work. to critique the work is to say "you should never work again"
A2 vis practitioners lack the mechanism to explain why vis feature X is worth so much work. few vis practitioners in management, on the stakeholder side.
does not work for everyone, many not pugnacious by nature