I can see it being used again, I just rather not, because he's been having a head injury for long enough.
I also don't want it to be a crutch for people below Dick's skill to take him out when the plot needed... unless they're taking it seriously as a disability problem. That he has a physical weakness now. Now that's an interesting angle that should've been explored in Ric Grayson, but they went to the most annoying way possible.