I don't disagree. Not that I don't like Wally, but this isn't the Wally West we know from the comics per say. If ginger Wally West showed up, that might spice everything up a bit. At least I think that's the problem, but I admit I don't know too well.
Though Wally did show up for one episode that wasn't a flashback or archive footage which was 5x01 Nora episode. That's more than what Jay Garrick got for season 5.