I cannot argue with any of your respective suggestions. Making an MP more accountable to their electorate has definite merit, as also making candidate selection a local responsibility (no helicoptering in anointed ones)
Ensuring the electorate is capable of understanding the election process is a worthy ideal, but a method of implementation that meets universal acclaim would be some challenge.Perhaps a multichoice series of topical questions on screen to validate capability and further on screen interrogation to prove ID after prior registration.
There would be unhappy bunnies whatever route was taken. But should an election outcome be dictated by a sector of society that some would say is both functionally and educationally illiterate?
That is a quagmire to enter and could generate many unintended consequences and could easily lead to the rebirth of eugenics.
As I said above the idea has merit but the dangers of it being hijacked by special interest groups would steer me well away from the idea. Any restriction of voting rights, no matter how innocently intended, could open a Pandora's box. Democracy is a delicately poised beast as it is, introducing any constraints could aid it's destruction.