His shazam could had been the best earth one book, but it's not earth one. It's the continuity. The main problem Captain marvel fans had with johns was not that he shat of the mythos and got rid of them, it's that his focus was solely to have that as a movie pitch and after 6 years it hasnt been replaced with anything, no one else is allowed to touch the character and johns isnt doing anything with it. that's the issue, taking away the gods and replacing them with the diversity kids and then not doing anything with the diversity kids or the council of wizards.
The issue with Batman earth one isnt that he has flaws, all batman versions have flaws (outside brave and the bold) its that Bruce has literally no redeeming qualities, he is just an angry manchild, a moron on a batsuit. Batman can be arrogant and a dick if he is that good, or he has to be humble if he isnt that good. The death of his parents drove him to dress as a Bat. Not to be a hero, not to protect the innocent, not to better himself, not in a quest for vengeance, just to dress as a Bat. I believe that johns biggest fuck up with earth one is making bruce 25 years old, Bruce should had been 15 or 16 years old and all his fails and stupidity could be blammed on his age. The entirely of Batman Earth One could had been extremely different with a younger Bruce, but instead what you get is ANOTHER rookie batman comic, and sadly there's already a lot of rookie batman stories in different mediums and most are way above average, earth one can't hold its own weight against Shaman or Gothic,