I’m not talking about repeating – I think whether or not the OU should use DE, and the reasons for each position, is not where this thread was.
I think the concern is not intentionally mixing it up. The OU’s job isn’t to force people to keep kosher against their will.
I think their concern is that people will think DE needs only be treated as milchig as a chumra, or that the only problem is actually cooking it with meat.
I would guess that they changed that policy because of cases that people were nichshol, not b’meizid, but b’shogeig.
You can’t anticipate and prevent every possible mishap, but I guess that within reason, they try to do what they can.