Hmm,
UncleBob I think the problem is you remember when DC's brand name actually Meant Detective Comics.
These days DC Comics does not stand for Detective Comics. It just stands for DC. Yes, people that know where it originally came from can appreciate the history, but I don't even think DC the company would be like yes our name is Detective Comics, because now they are so much more, and the brand is bigger.
So Now despite the history it is just DC Comics.
Now the Logo still has the Image and writing underneath for re-verification of the brand, and that maybe over kill. I mean if you can't see what the logo represents perhaps it is a bad logo. But again, I can understand why they did that, because the logo is abstract. You can definitely see the D being turned revealing the C and representing the turning of a comic book...but hold on...is it definitely a D? It could be a B. or not a letter at all. For this reason I can see clarification is a good idea for the logo. Adding DC Comics helps those that don't recognize the logo clearly know what the company is...and that is a good thing.
Finally, you added that DC Comics has to write Comics in the logo? Why is this for clarity for patient or copyright? If so then your argument is kinda silly...just like the logo may be.