I doubt that Mark Waid Not wanting Barry to come back had anything to do with him not wanting Barry around or not enjoying him. It was a different time then and the characters had forward momentum and it we weren't yet firmly stuck in the quicksand of nostalgia that this generation is. I completely agree that the lack of permanency in death and lack of progression of the characters hold comics back a lot.
But the genie is out of the bottle now And we have Barry's Resurrection in a way to thank for Wally's. Because after watching Hal and Barry come back there was no way Wally fans were just going to accept that he was gone.
I'm just still in shock that none of the writers have done the one thing that would be new which is have a co-lead flash book with Barry and Wally as The flashes working together as equals. Think Dom and Brian from Fast and furious.