lawd...
I'm going to preface this by saying that Tom King, imo, is potentially one of the best writers working in comics today. His run on Batman is, for me, the best run in one of the character's books since Grant Morrison left it. His five-page story in Action Comics 1000 had more emotional weight than almost anything done with Superman since Morrison left Action Comics. At personal stories, he's great... When the premise behind the story works.
With Heroes in Crisis, it doesn't.
He fell in to the trap of wanting to make the characters fit the story, which is almost always a faux-pas when you're dealing with pre-existing characters. The characters shape the story, not the other way around. And yes, while I agree that there are some good parts (Harley going to Sanctuary being one of them), the idea that someone like Superman or Batman would go there is, imo, frankly ludicrous.
It also feeds in to what I perceive, at least as an outsider, this American ideal that therapy can solve all your problems. But that's just a loose theory on my part.
His characterization of Wally West when it comes to his actions is also abysmal, and I am not hyperbolic when I use that word. It's disturbingly bad. And yet, the panels where he's talking about Wally's grief are really well done. You genuinely feel for the guy and what he's lost.
In the end, I think the event is largely a failure, and it is down to King, as much as I like him. I don't think he deserves to be kicked off Batman, and I do think that he was unfairly treated over the whole Poison Ivy thing. I also, though, think that he needs to sit down and seriously learn that putting your own spin on something does not mean going so far as to completely ignore a character's pre-existing characterization.