Final Crisis really is not like CoIE or IC. While FC has made changes to DC, it's not what I'd call the reality shaping story that defines the DC universe like the other Crisis stories.
FC brought back the "New Gods" from their "this does not matter" destruction in 'Death of the New Gods". It established that pretty much everyone knows about the returned multi-verse. (Arguably, it also established that there are more than 52 universes, as evidenced by the 60+ Supermen in issue 7.) Barry Allen came back.
I will grant you that it was a different type of story from "Crisis on infinite Earths", "Crisis in Time" (the alternate title for "Zero Hour"), and 'Infinite Crisis". But, it still pretty well sums up DC's current direction.
Countdown and 52 were somewhat unique stories given they were being released weekly. I can excuse that those wouldn't be the strongest stories given the fast pace they had to go with. And Didio I'm sure greenlit stories he felt readers would find interesting, which the reactions I've seen for the most part support.
52 was amazing, despite low expectations. It raised expectations to new heights, right before "Countdown" brought then crashing back down. i re-read "Countdown" and am almost positive that it, and the cross-overs, were deliberately bad. (Think of it as performance art about bad comics.) It got worse in increments, and there are enough thematic similarities between the comics to make me suspect that the 'stovepiping" some writers complained about was something of a fib.
if nothing else, given the brain trust working on both "52' and 'Countdown", there is no reason for either to be less than readable.
The most naked example of "so stupid it cannot be an accident" is the fact that Universe-51 died twice, and both deaths were contradicted in "Final Crisis". "Final Crisis" ignored a number of points from 'Countdown" actually. Morrison not only seemed to not care, but seemed to be doing this on purpose.
It's a power battery that the Guardians themselves built. You don't think they'd be able to fix it? Or someone with the power of the Emotional Entities themselves? Fixing a power battery is a relatively minor thing here and nothing new or unique to Blackest Night.
Given the import attached to the main battery in "Green Lantern", and the "oh no" reactions when it gets destroyed, the fact said batteries can be repaired so easily kind of illustrates the 'nothing every sticks" point.
Ugh. All of this is at least partially why I'm not sorry I dropped the Marvel books. I'm really sick of the "epic event level multiverse changing reboot story" approach to comics. I'm really not even in favor of the 6 issue story arc approach. I really wish that comics would just get back to be episodic instead of all this epic level crap. This is why I like Buffy season 8. It's episodic. Sure there's a "larger" story for the season, but it's not overshadowing the individual "episodes". And it's actually good.
i lost interest in "Buffy" with season 4. From there, i watched a few episodes, and gave up completely when it started to turn into 'bad guys reform' hour. (Nobody thought to kill Angel, Anna, Spike, Faith, or even Buffy "I like 'em hostile and without a pulse" The Vampire Slayer?)
I do not mind rare events. I do not mind changes. But, the events and changes need to be worthwhile and have some staying power. Bringing characters back because a writer regrets killing them off, (Waid and the Rogues Gallery come to mind here), or because a "star" writer wants to use a dead character in current context, (Kevin Smith and Green Arrow), is just cheap. Similarly, bending to the complaints of fans, ("noooooooooooo, not Bart Allen!!!!111!!!1!!!" or "OMFG, the killed Blink, the bestest character ever!"), does not give comics much staying power either.
Dom
-tends to avoid DC now.