Johns wanted a big reveal in Forever Evil.
No one considered the consequences of that action until well after it had been printed. Nighting #30 was completely drawn, then it was dropped. Tynion was supposed to be writing Nightwing but that was axed. There is a blonde man sitting with the other members of the bat family in Batsgiving. It was probably Dick with bleached hair. The "death" messed up the awesomeness that would have been all three former-Robins going to Apokapolis to save Damian (instead we get Babs (good alternative but not quite right)). The first images of Harper as a super hero were labeled "Nightwing" (red herring? maybe. Who knows).
The death was needless and gimmicky. It was done for the sole purpose of generating buzz.
Having said that, DC took the dud idea and turned it into one of their best comics. So I can't really complain.