The only disappointment would be that it is far too late to start believing in any Corbyn promise to campaign for Remain. There's way too much evidence that Corbyn wants to leave the EU, and will defy the party to pursue that policy. Any Remainers wanting to vote for a Remain party will have to look elsewhere. It needn't have been so. It shouldn't have been so.
Indeed.
One of Corbyn's strengths is that as a campaigner, he can be very passionate about a cause he believes in, and people of a like mind respond to this. Conversely, he comes across as shifty, lukewarm and untrustworthy when trying to promote a compromise position. This is a great weakness for a prospective Prime Minister, who necessarily has to compromise and respect the idea of a Cabinet's collective responsibility.
After so long trying this 'triangulation' approach, a Corbyn conversion to promoting Remain for the good of the country and for the Labour party would be most welcome.
However, I think a lot of people would be interested in seeing a fair track record being established that he was genuinely passionate about the change of mind, and brought those campaigning skills to bear. I fear we would see the dissembler rather than the advocate, which would not help matters.
Having said that, it may be that many of us would return to voting Labour with it standing on an unequivocal Remain position (even with a lukewarm leadership) merely because Brexit is forever, whilst a Corbyn government is for five years - and may even turn out to surprise us. As I have said before, a Labour government returned immediately after the Tories impose Brexit would face unimaginable economic problems and be unable to enact any really progressive policies whilst circling the drain.