PS Committees archive nothing is actually false statement. Committees are responsible for every regulatory framework you have ever used. And even when you don't know it. You use them every minute of your life.

They are just slow. And even that can be resolved with. A regulatory framework.

In theory (and it's still to be agreed to formally).your party will expect members to vote on overall policy at conference each autumn. That vote will happen every autumn. The conference pre election it will form the manifesto. As it dose for every party in the UK. All that is different is who get to vote on what.

MP will be selected by constituency sub parties. As Labour claims to do. Your party will just not allow the leadership of the party to parachute potential support into safe seats. The local party will have full control over candidates. (With some to be decided vetting process. Not yet discusses but criminals etc)

Once an MP is elected. It works as any other party. That MP vote in parliament based on consultancy needs. The leader is selected by members not MPs (or MPs controling the choice members can make)

The big differences are in the ability for the leadership to protect MP when they fail a constituency party. It won't exist. Next election that local party can replace them before the election. Preventing Top down control of the parties long term political agenda. Instead replace with democratic control from active membership.