Not really, it's being done via the backdoor already with the modularization and specialty model of instruction. Basic OW barely trains one to dive in benign conditions unassisted - which probably all vacation divers really need. They don't need to read tables, tide charts or swim long distances against strong current etc..
Now, want to be more independent? take AOW. Want to go deeper? take Deep diver, gain better buoyancy? PPB. Look at wrecks? Altitude dive...
Other agencies are also changing this indirectly. GUE and UTD both offer OW training but they make damn sure to differentiate themselves from the OW you might gain from the mainstream agencies. Why? Because they churn out more comprehensively trained divers. Those two agencies certainly don't want to equate their OW divers as being on par with all OW divers training wise.
I don't get why this would be an issue - it's a win win for everyone.
The diver gets what they want - as Pete states, most rec/resort divers don't need/want to learn tables. Don't want to get bogged down in theory and would be perfectly happy to gain a "resort diver" cert if that's what it allowed them to do.
Other divers who may enter more challenging conditions may want a more comprehensive course. they may actually need to look at tables for dive planning, current or tide charts etc... why not offer them what they want and call their cert "comprehensive diver" or something.
Upgrading from resort to comprehensive could be done in modular form, just as it is now. It's just the labeling that leaves little doubt as to the training one has and conditions one is prepared for.
Going back to the person who showed up at the altitude lake not knowing how to assemble or use gear. Entirely possible when one goes from a warm water resort where DM's assist with the gear and one uses a 3mm suit and 3lb's of lead (my rig). Which is what that person did. They did 7-8 dives on vacation and, being certified OW divers, decided to rent gear and join their friends at the lake. Except of course, they now had 2, 7mm layers of neoprene, thick gloves, 30lb's of lead and no DM to assist them. Did their previous training prepare them for that.
We could blame them for not knowing better or we could look at a system that labels both forms of diving the same.
Resort diving and other forms of diving (like cold water) are not the same as Boulder John might suggest. The equipment is different and more cumbersome. Try doffing and donning a rig in cold water exposure gear and then in warm water gear - here's a video of me doing some nonsense in warm water gear that I would not do in cold (I was really trying to put together a video of some vintage skills but that didn't work out so well). Even removing a mask is different. In WW it's an inconvenience - in CW it can be excruciatingly painful and disorienting. Good luck below the thermocline in Chilliwack lake if all your mask removal training has been done in swimming pools and Cozumel.
[video=youtube;QpsR3EBysg8]http://www.youtube.com/watch?v=QpsR3EBysg8&list=UU5zvhnU0XYpf_cadpYJYkhQ& index=7[/video]
Looks like there are training opportunities to fit everyone and the market is taking care of itself. Want to get comprehensive training? Go to agency A. Want to get minimal training and still get a cert card? No problem, go to agency B. We even have an agency somewhere in between. Want to learn more about the area you are going to dive in? No problem, there is a course for that called discover local diving. Want to go deeper or learn tech diving? Yes, there are multiple options for that too. Basically it is what it is and regardless of opinions, the market will always dictate. After all, it takes money to make the world go round as they say.
You can offer all the comprehensive training you want but the best thing any diver can do to improve their skills is to dive. If you spend 100 hours training someone to a very high standard and they only dive once a year for 2 dives while on vacation, they may never have the skills needed since they don't practice enough. Take another diver who took a resort course then got the bug and dives every week year round and see who is the better, more skilled diver after a year or two. You need to dive to become a better diver. The more you dive, the more situations you are exposed to and the better you become. We just can't control the bad habits of divers, and all sorts of very competently trained divers have bad habits.
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