Brian
Eating fat, staying slim
In 2017 Labour offered something very different to the tories and very nearly got there.A new party will change nothing. If anything it will only splinter and dilute the anti-Tory majority even further. The core problem is Labour as they are anti-democratic and prop up the failed system whilst offering nothing of value as a counterpoint.
Your dislike of Labour and your wish for complete reform of the system blinds you to the fact Labour is not the problem here. The problem are tories and those who search for any excuse to not support the only viable alternative.
What you describe sounds great, I would love to see it but it isn’t going to happen. That’s the real world and in that world I would prefer the tories be out of govt.