Read this & World Tour concurrently but didn't keep separate notes, so this review is for the Beast World event as a whole.
First off, what happened to Jarro? We're keeping Penguin's kids running Iceburg now as canon, but when a world conquering starfish is needed, Gar has to do it? Also, since when could Comic Book Beast Boy transform into animals not of earth? For that matter, when did he regain full control over his powers? That was a major plot point right before this event in the Dawn of DC Titans series.
So glad Starfire, Donna, and Powergirl are back in the mix. And a Martian Manhunter sighting?!?? When did he get revived? (Seriously, J'onn & Luthor both died by the same enemy whose defeat rearranged the multiverse. Why do they get to be reborn but not Jarro...in a story featuring Starro?).
Semi-relatedly, when did Beast Boy get the Eye Deathstroke shot out back? That happened after Death Metal.
Really liked Apex Ava. As well as Doctor Hate (that twist!). Glad Jon & Damian are still BFFs but if you didn't spend the 2nd half of Rebirth reading their 2.5 team up series, the friendship between 'still a child Damian' and 'aged up in space YA Superman Jr' in this comes off a little weird.
Waller is one DCs best Villains & one reason for that is that she's realistic while not feeling out of place in a superhero fantasy. So I question the wisdom of using the most unrealistic plotline possible (oh, no! Half of errbody is now an animal-person) to set up a realistic villain as the BBEGal (especially because she didn't need much help in the first place).
I get this whole thing is just meant to set up the next event (Absolute Power), AND triggering a worldwide catastrophe to facilitate a power grab is totally Waller, BUT there's other baddies the 'Beast World MO as part of greater evil machinations' would fit with much better. Maxwell Lord (who could more easily mind control primal-ed heroes). Or Cheetah with leftover Perpetua god-power. Ocean Master (turning land dwellers into beasts so they tear each other apart is SO evil Atlantean). Or Dr. Hugo Strange (who's known for making hybrid monsters); and there hasn't been a good evil avatar of The Red since New 52 Swamp Thing/Earth 2 Society.
The second half of the story has some pretty series allegory for a Big 2 LineWide event, but it's also full of plotholes...Light Spoilers to follow...
Why do the Titans not try magic to solve any of this? (Not least of all because, aren't Beast Boy's powers technically magic based?) I mean, Zatanna could remove the spores, from a distance, with a few magic words. Dr. Fate could work any number of magics that would stop the crisis in its tracks in multiple ways. Just off the top of my head, he could gather or generate enough power to attract the spores out of regular people without putting the heavy hitter heroes at risk. (Shoot, pretty sure Cyborg or Mr. Terrific, or Mr. Miracle's motherbox, or Dr. Light or Atomic Skull, or even a GL Lantern...could have done the same thing with their tech/powers). AND you're telling me Kent &/or Khalid weren't sent by the Lords of Order the minute Dr. Hate woke the necrostar?). OR combine Vixen/Animal Man/Buwaga Beast with spellcaster, Martian, or Cyborg tech and take control of and calm all animal-people?
Point being, there's dozen of ways Nightwing's plan could have been carried out with little risk to the "League's" big guns/Before Waller could fully carry out her plan. The writers going out of their way to let Waller succeed to such an extent that, especially when coupled with metalogical animal people, it's impossible to suspend disbelief enough to get lost in the admittedly action-packed plot & storylines.
P.S. I know I read Infinite Frontier, but I remember none of the status quo changes mentioned within this review. But I also don't really remember specific deets about that Special, so I could just be misremembering, I guess