Finally, what's in it for the disenfranchised and non-voting people of Britain to want to vote Labour? By and large, these are people in the old C2DE categories. There's absolutely nothing in Burnham, Cooper or Kendall's views that would make them go "you know what, that's something I'll support". The overwhelming message is that "the Tories are right, we need more austerity, more punitive action against those earning less, fewer opportunities for small businesses and god help you if you get sick or disabled as we promise to invest even less than the Tories in the NHS"
And what is Corbyn offering working people?
Most of his policies, which you can read here, don't seem to me to have any obvious benefit for ordinary working people.
Only UKIP is proposing to end the free movement of labour, which is probably the biggest single negative determinant of the standard of living of working people and their families.
Corbyn's posh background doesn't give him a natural empathy with working people.
Like Tony Benn, he seems to have arrived at his socialist principles intellectually, rather than from his own experience.
A very good segment on Corbyn on Sky News just now with snap interviews of young people and their views on Corbyn with the consensus (and most likely carefully selected) view was that Corbyn was a massively positive effect on both Labour and Britain.
My favourite two Facebook comments I've seen from my friends so far on this are:
"SNP gets a huge insurge of youth membership they revel in it and make it a key part of their feel-good drive, Labour gets a huge insurge of youth membership and they're made to feel unwanted simply because they dare to have an opinion outside of that of the central party"
"The three other candidates can at least now show that they have made a decision and can express an opinion, albeit that it's just that they dislike Corbyn"
On that last point, I heard Burnham on radio a couple of days ago criticising Corbyn's view for being wrong on many things but then offered absolutely nothing in rebuttal beyond "it's wrong". Well, unfortunately Mr Burnham, that's just not good enough and is why you're going to lose.
I do agree with you that part of the problem is that the other three candidates haven't set out any sort of a vision.
Corbyn has, and will win because, as I wrote earlier in this thread, he is the only candidate who has actually looked like a potential leader in waiting.