This is a pretty simple suggestion.
The dragon ability Determination got its delay lowered a while back because of the annoyingly long pause that existed between its use and the use of any other abilities. Primal Roar, the sister ability to Determination, however, did not. It still has that long pause after it.
Thus, the suggestion is simply to bring Primal Roar's 80 delay in line with Determination's 40.