The idea of DB'ing isn't to dazzle her with a huge demonstration of how much you've changed. It's to fade into the background while she goes on her journey. She won't see you as not "THE problem" until you can remove yourself from the equation. When she discovers her life isn't nirvana, and that she can't blame you for it anymore, THEN she might look back and THAT is when your changes and 180's will matter. If she looks back and sees YOU-2.0 looking good and feeling good and enjoying life, then her curiosity will be piqued. She may question her choice to leave you.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712