#2 Long-term planning
If this year's WrestleMania card was any indication, WWE is constantly changing their plans, and over the years, it's really hurt their ability to tell long-term, compelling stories.
When things are being changed on a daily, and at times, hourly basis, it makes it difficult for the audience to follow along. In short, if management can't even make sense out of the storylines they're writing, then how is the talent supposed to present a compelling story?
Of course, in time, we'll see how All Elite Wrestling goes about planning their weekly television show. But, at least as of right now, one would expect them to have at least a few long-term stories planned.
Having long-term plans that are occasionally adjusted based on how the audience is reacting will do more for WWE over the long haul than what their current system is, which pretty much calls for daily changes that are based on one man's unpredictable impulses.