Don't even get me started on how they magically gain the ability to use nen even though it takes the most talented of humans awhile to master. Nen battles are supposed to be about the skill and strategy of the user (Ex. Kurapika vs Ubogin) but the ants simply overpowered their opponents, they weren't particually skilled in their application. Hisoka is a good villain and great fighter because of his flexibility and creativeness when it comes to nen. The move away from skill deciding battles to brute force was a mistake.
The pacing is terrible, especially compared to the previous arcs. Instead of going from point A-B-C there are detours throughout that drag the arc out longer than it needs to be. Simply put, this arc is erratic.
Meruem is ridiculously overpowered (Neetero, one of the stongest nen users in the WORLD can't scratch this dude but a generic bomb can? Get the fuck out of here with that) and a lazy clone of Cell/Frieza.
I know Togashi hasn't exactly been creative when it's come to Hunter x Hunter but this is embarrassing.
An interesting character in Kite is killed off prematurely which is a damn shame. I really wanted to see more of his ability and it's weird that a Hunter of his calibur can be murdered pretty much effortlessly by some furry.
goodnight, sweet prince
Don't sit here and try to treat me like a fool. I get the underlying themes of genocide, "master" race creation and corruption but they have no emotional weight considering the absurdity of the situation. This whole bullshit arc has lost what hooked me in - the adventure. The Chimera Ant arc is focused on power and fighting rather than exploration. It lacks the charm of the Hunter Examination/Heaven's Arena and the complexity of Yorknew/Greed Island.