Since the idea of midichlorians is universally hated (I hate it bitterly), use of The Force has to be more than spiritual otherwise everyone would be able to tap into it. Every Force user has to be biologically more capable of accessing that unseen power, some more so than others. Being more spiritual isn't going to help in this case.

As for Jedi putting themselves forward for cloning, just as with Darth Vader being a name, it might also show why they are long lifed...

Anyway, it was merely an idea and I think it's not a bad idea - ok, it's a little hokey but hardly a trilogy busting idea...I just think the Clone Wars needs to be more than the fight between the cloned army of one person and a million robots that act like the three stooges...

Edit: the fact that Vader has been involved in a life threatening fight has been part of Star Wars lore since the beginning. You cannot change that he has become crippled due to his fight with Obi-Wan. Whilst it is an interesting idea, I think that there has to be a proper face off between the two once friends which will result in Vader taking on the mask and suit more permanently.