I believe he should go on and make them as I don't agree with his concept of balance...
If the Jedi have knowledge of the force... What are the odds that someone will be tempted to use it for "un-Jedi" reasons.
Balance cannot exist with control...
It's simple... Start the movie with "obi-wan ghost's" being assasinated and all the actors issues are fixed.
Just Joking
But in the end Vader could bring that balance in many ways, just use your immagination coz that's all you'll be able to see.