There is nothing in the statement that I disagree with, but I think it omits important points.
Labour has failed to convince people not just because of mistakes made in the last five years, but also because of its abandonment of the working-class particularly in the two decades before that. The much-used word, 'trust', was lost during the Blair and Brown government, and has been undermined by the actions of many Labour councils. The last four years have not recovered that trust, due to the mistakes that this statement rightly lists.
This is why it is important to resist moves to push Labour to the right, and the statement would be stronger and more rounded if it explained that.
Also, I find it odd that the commitment to liberation politics doesn't mention disabled people or homophobia.