I thought that Corbyn was a good choice - Labour needed someone who actually believed in something, rather than just seeking the right piece of spin to ensure people are saying nice things about the party (put that way because it's not actually a synonym for being electable).
Labour aren't electable at the moment.
Going back to Blairite spin would just mean the end for the party.
UKIP has a real chance of becoming the next 'second party' because of the Labour collapse and because they are strongest in what should be Labour traditional heartlands.
A leader with principals and beliefs would not make the Labour Party short-term electable (and would not necessarily see that as a desirable goal anyhow) but would be leading the party, telling the public about the new vision, persuading people that it said vision is right. And then that in I tself would be the counter to a government formed from a party with a different vision.
Corbyn has now had long enough to demonstrate that he can lead at this level, and can persuade the electorate. I do not think he is doing so - I think people would be just as hard pressed to know what Labour stands for now as they were at the last election.