I have changed from 'yes' to 'don't know', but there's a little more to it than that.
The 'yes' that I have long supported, albeit conditionally and tentatively, has been made more difficult, no doubt. The prior narrative, or possible narrative configuration at least, of an unstable, premature and incompetent economic expansion project was one thing - ends, means, balance with the social project, etcetera. The now apparent narrative of what actually happens when push comes to shove is another. Its behaviour and nature is not an enormous surprise but I genuinely never expected the mask to so thoroughly slip so quickly. I know it's naive but I'm surprised and appalled by how brazen and unapologetic it is. Wars have been fought over less, and history will not be kind.
However...
I have exactly no more respect for the proponents of 'No' than I did before. I have a mixture of apathy and contempt, depending on what apparently motivates them. The dominant Eurosceptic voices in this episode have been of isolationists and nationalists, who care as little for Greece as they do for the contemporary EU. Noone is calling for reform, noone is putting forth a better internationalist proposition, and so I'm apparently expected to choose between continuing this catastrophe and a hopeless retreat into a cave. The French and Italian establishments are the closest ally, for fuck's sake. To me, this confirms my suspicions that the left version of the Eurosceptic crowd have nothing more to offer than, 'well, not this' and will be a clueless, impotent irrelevance as soon as they get their wish granted.
The whole lot of them can fuck off. All that's really happened is it's become a more miserable choice.