No problem with that..
I personally loved this issue actually its the only one of the rebirth that i'ved collected.and even though I love me some MERA I wont buy anymore issues if hitch is drawing or writing the book.
I've thoroughly enjoyed the issues without Hitch. To the point where I wouldn't mind one bit if either Shea Fontana or Dan Abnett were the regular writers.
Now as far as Mera "taking down the League" too easily? I say baloney!
It was a combination of her awesome power, and the restraint of the Justice League since she's Aquaman's woman, and also a friend of theirs. The whole thing was handled very well by Abnett IMO.
WHO DAT?!!
I don't see the problem. The fight was used to show unfamiliar readers what Mera can do in a fight. I'd say it did its job.
Yeah none of this was beyond what she normally does...
Current Pull: Lazarus, The Realm, Seven to Eternity, Aquaman, Flash, Justice League Dark, Justice League Odyssey, Sideways, Black Panther, Captain America, Daredevil, Death of the Inhumans.
Future Pull: Killmonger.
To be fair, the League does have this bad habit of being creatures of mostly water. Immensely powerful mostly water, but still mostly water.