"Jim. not a problem."
Ditto
You missed what I believe to be the most important requirement in your list
Make all MPs and parties answerable to their promises and subject to recall should they fail to live up to them
Without this, your suggestions would be little more than moving the deckchairs on The Titanic and they will continue to do what suits their careers rather than the people they are supposed to represent.
If your car engine packs in, you don't just change the tyre.
Jim Carroll