By shifting the training paradigm away from CA to the tropics, we have created standards less suitable for competency.
Less suitable for competency in non-tropical environments, yes.
I train in conditions that are arguably pretty bad but standards don't force me to undertrain students. Standards just give me a framework--a list of skills they need to learn--and I use that to train students to dive in our conditions.
Where I would fail would be if I tried to train students with, for example, the level of situational awareness they get in a resort course (namely, zero). If I did that they would be pretty much unable to dive locally. They wouldn't even be able to make a descent without losing their buddy before they got to the bottom.
Do standards stop me from teaching to local conditions? No. Not at all. Do they offer sufficient breadth and depth for local conditions? No. I have to focus energy on the big-3 for local diving. Do standards stop me from teaching the big-3. No. I can teach them what they need to know for local diving and I can make them do as many dives in OW as I see fit for them to get used to conditions, etc. (ie. I can set the bar as high as I think it needs to be as long as I can argue that it's being done to prepare them for local conditions).
The issue with standards with respect to our conditions is *not* that it stops a decent instructor from teaching a good course. The issue, if there is one, is that a completely clueless instructor might not see that students need more attention in some areas than the "minimum" requirement. Once again, if it's required for local diving (like the Big-3) the agency doesn't object, but the instructor has a personal responsibility to teach his students what they need to know.
I keep coming back to this point, which is that the quality of a scuba course has much more to do with instructor competence than the list of skills the student is required to learn. Standards have a marginal impact on the quality of training. Blaming the agencies for a perceived quality issue is to exonerate the instructors, which is where the quality is deliverd (or not).
R..