I agree with you about the lessons. It's fortunate that you learned the lessons and still had the opportunity to reconcile with your H. I wasn't as lucky.
The journey was a very humbling experience for me. I took so much for granted when I was with my H. I had this false sense of security and even a bit of smugness (embarrassing to admit now) that my marriage would last forever.
It certainly knocked the wind out of my sails. I did a lot of soul searching and didn't always like what I saw. I learned a lot of lessons (very similar to yours) and did a lot of changing. The "old" H would have been thrilled with the new me. Unfortunately, the "new" H doesn't know and couldn't care less.
Even though I lost my marriage, I won't lose the changes or forget the lessons learned. I would never want to go back to being the way I used to be.