Yes, the USEF ought to choose the "make it possible/easy to find D&M rules infringers" strategy. If they changed nothing else, this bit alone would help it appear to stand by it's mission.
This might be a bone thrown to the Powers That Be who currently exploit the light punishments imposed. They can bet on clients not caring or bothering to do their research. IMO, this is what trainers do now. But they can know, too, that the GOB supports the smarter potential client who wants that information. Since no one knows how much any of we HOs wants or seeks out that information currently, it might work as a proposal that makes its supporters look like advocates of clean sport without actually risking anything, should they believe their clients don't know/care about the drugging they do.
It's a win for the clean; it's a win for the dirty. You need both.