This is wrong. You can't just port all of Wally's stories onto Barry. Wally's literal best story is about the idea of Barry Allen coming back ruining his life. You can't turn Iris into Linda, which is the backbone of Waid's entire run. Hell you can't even do a lot of the Bart stuff because...why would Iris come back from the future if Barry never died? What's the point of Hunter Zolomon, whose point is to be the Reverse Flash to Wally, when that's already Barry's thing? How do you do Waid's final arc with Barry and Iris when Barry and Iris are already married? How do you do ANY of the stories that revolved around Wally's identity being public -- something that only happened because Barry died?
There are certainly some stories you could port over. Once you get rid of Bart and Jenni I don't see why you couldn't do Dead Heat with Barry. And I guess Barry eventually got his own version of the Dark Flash saga...it just happened to be the worst Flash arc ever instead of good. You could probably do Chain Lightning though you miss a lot of the meat of that story. The idea of a time travel rollercoaster ride through the future history of Flash legacy falls a little shallow in a comic that wouldn't have legacy as a backbone of its storytelling. Similarly, the same would be true of Race Against Time -- you could port over some kind of phantom imitation of it but the stuff with, say, The Tornado Twins doesn't work from that arc.
Maybe you could do a lot of Johns' stuff with Barry. You can't really do Ignition due to the secret identity thing but Ignition was his worst arc anyhow. All the Rogue character updates are certainly transferable, though the idea of Wally getting his own new set of Rogues wouldn't mean anything if Barry was still The Flash. You also obviously miss out on Rogue War because of that and the finale kind of needing the Barry-Wally vs Hunter-Thawne combo.