I think Punch hit the nail on the head with one word he used to describe this issue: Disjointed.
I think Johns, with Trinity War coming up and the launch of Justice League of America as well as the wrap-up of his Green Lantern run, has been overextended for a few months. It has shown in the past couple of issues of Aquaman, where he's just wildly seeding and seeding and seeding plots but not really doing what made this book a good read in the first place: Focusing on Aquaman.
I don't give a shit about Atlantean intrigue. I know that's part of the deal, but you'd think Johns realized by now that that is the death of the character -- nobody can relate to that shit. Introducing a ton of new characters into a book with a lead character that, to be blunt, can easily struggle when not given clear action and thought sequences...
Come on, Johns. We get that you're busy, man. But Aquaman is not a book that you can just dip your toe in -- the lead character needs to be the focus. Otherwise, this relaunch will fade away like so many other Aquaman books have done.
*Sniff, sniff* "Damn it, Diana...If I'd known they would trade us in for a JT Krul-written Captain Atom and "The Savage Hawkman," I'd have let Superboy-Prime destroy all reality.""Superman flies and is really strong...what the fuck else do you need to know?!"
-- Hitler, expressing his displeasure about DC rebooting and complaints about continuity