The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
I´ll second that. Deep Horizon is the worst entry in the Adventure Path series by far. This one even made HoNS look good.
Other than that: You´ll have to do LOTS of preparation on the second part of the adventure (the "murder mystery"). Do it thoroughly and do it well ahead of time.