SPOILERS AHEAD!
Here's some of my comments from another board. It's a bit piecemeal, but I find that appropriate considering the series we're discussing.
How the did DC have the balls to put this mini-series out. It's completely incomprehensible as a stand alone book. Characters float in and out of the story page to page. I still have no clue who the Asian Club Kid Heroes are. What was the point of Mary Marvel's storyline? Now she can't become Mary Marvel anymore? Meh. Was Darkseid really a ghost by the time Superman sings at him? Let me say that again... Superman. Sings. At. Him. What was with the devil/demon thing at the end? Where did the black Monitor and his woman come from? And really, the crisis wasn't the DCU's but the monitors? Ugh. This is how four years of mini-series and interconnected plots "comes together?" Nothing important or permanent happened, unless you believe Batman is really dead, but that'd be stupid if you read the last page (which only made sense in that Batman is alive, not what is going on).
While reading Final Crisis, Morrison's The Filth crossed my mind. That story was more cohesive (not by much though) and it wasn't an "event." The "anything can happen" thing is fine, if it's part of a well constructed story. This just wasn't one. Arguably, it wasn't even a story at all. Just pieces of other books thrown together as a parent title.
Honestly, I'm completely off ordering DCU books for the foreseeable future. This was a completely unacceptable pillage of peoples time and wallets. Granted, I was pretty much out of DCU books already. Now I'm just going to have to be blown away by a creative team or idea to check something out. If something like Batman: Cacophony were solicited next month, I'd get it because it's Kevin Smith and a character I liked that only he's worked on. But it's that type of level book, which is only once every couple years.
And the comment about "pretty pictures" from LITG is a joke. How many different pencilers, inkers and cover artists ended up working on this when it was just supposed to be JG Jones? And weren't those sliver covers supposed to make sense when all was said and done. Riiiiiight...
What a joke.