I will say that I sort of understand DC's issue with it, though. "Dick" jokes aside (hardly a new issue), it's a little distracting to have this character that's supposed to be in his 20's (give or take) have an old, archaic name that nobody of that generation wold ever use. This isn't an uncommon issue with legacy characters from the 30's/40's/50's, but I think his is unique in that while names like Diana or Clark or Wally or Hal may not be super common anymore, they're also not distracting in the way "Dick" is.
Of course, the uphill battle they have is that's what he's been known as for literal generations so changing it is easier said than done. And they've tried and failed before. I have noticed they just refer to him as "Richard Grayson" a lot more frequently now. I wonder if that's the approach they go with.