I'm not sure that this incident points towards the need for dive ops to change anything, quite honestly. Of course all dive ops should be constantly concerned about safety, most are, and as has been pointed out the overall safety record of Cozumel, considering all factors, is quite strong.
I agree. Anytime there's a fatal diving incident (which this one may or may not turn out to be, I take it), there's a natural tendency to start in with 'they should've done more.' If only this or that training modification were enacted, or this dive shop policy were universal, or dive cert.s had to be renewed or supported with continuing education, and so on & so on.
Disclaimer: I tend to vote Republican (though I file as an Independent) and am highly skeptical of the prospects of 'Big Government' solving Life's problems (I work in a state facility, and of course I see some of what the O'Bama and Congress are doing in the news...$16 Trillion debt, anyone?).
That said, I do not see stacking on layers of bureaucracy as a desirable reaction to the perceived problem. Especially since diver deaths will occur from time to time, leading to more and more regulation.
My concern is that when family and friends come to a forum like ScubaBoard, and read threads like this, they may come away with the sense that 'more should've been done,' and their loved one is dead due to negligence (e.g.: she wasn't trained properly, the dive op. took her to an inappropriate site without assessing her adequately, her buddy didn't watch her closely enough, not every dive boat in Cozumel joined the search, etc...), and there should be 'change.' Pretty much every death discussed on this forum entails some speculation, including about how the world could be 'better.'
Richard.
P.S.: While I like the idea of making the first dive an 'easy reef' dive, it could impact business. I dove twice in Cozumel one day during a cruise stop. We hit Palancar Garden the first dive, then Santa Rosa the second. P.G. was okay, but Santa Rosa a much better dive (just my one time anecdotal experience). Many people dive on cruise vacation, and only get 2 dives in. An op. that gets a rep. for always doing a common simple site for one dive might be passed over for one that doesn't. If I went back to Cozumel for a week, I'd be happy to hit Palancar Garden again. But if I were only getting 2 dives in, it wouldn't be my first choice, and Cozumel gets a lot of repeat business.