The standards really aren't that different. It is just what can be done if the class is pool only and what can be done if it involves open water.Also, do you perceive a benefit to having the two standards versus just one standard that covers all the way to open water?
What I'm wondering is, if you just have one standard that covers open water, then an instructor could choose to offer a course that is only pool and conduct it as a DSD that is simply never completed. In which case, is there a benefit to making that officially a pool-only DSD for some reason?
You are really, really, really trying to make this into a huge deal, as you typically do whenever trying to assert the superiority of your agency over all things in Heaven and Earth.