Well, you have a diver who thumbed a dive very early. First question is why? Was she just uncomfortable with the conditions, or was she already feeling unwell before coming back to the surface?
Once on the surface and at the boat, you now have a diver who thumbed a dive trying to reboard. She probably either thumbed the dive because she was feeling poorly or because something about the conditions made her uncomfortable. Either way, she's probably not 100%. I'm not sure I let go of her, and I know I don't watch her go floating off for multiples of minutes with some part of her gear already removed. Whatever her initial issue, bouncing around for 15+ minutes in 5-7' seas could only make it worse.
The article says she was removing at least some part of her gear prior to boarding. I wonder what gear she had removed prior to losing the boat, and if that played a part in the fatality. Is there a lesson there in terms of what order to pass stuff onto the boat? Should there be a line to grab in order to avoid floating away? Was she conscious at that point? Were any words exchanged between the DM or crew and the victim such that they might know why she thumbed the dive?