I think this chapter is pretty coherent to her character. If you come to her, you're not allowed to leave or abandon her.
She has abandonment issues. The only difference is that she has extreme power to vent her issues.
What I don't like or appreciate is this Zeus's "incompetence" fiasco If one of your main powers is as incompetent as Prometheus and Napoleon are all of a sudden making him out to be, then how is Linlin unbeaten and unmoved after more than 2 decades on the top of the pirate world?
Honestly, it's just an excuse to give Nami a new powerup. It's a bit "justified" but seems odd that they've only come to this conclusion after 6 decades of being with Zeus. Heck, Zeus was there day with with Prometheus. Napoleon is like 22 years old only.