#4 Giving the wrestlers more creative control
When people point to many of the unfavorable happenstances in pro wrestling, a common culprit to blame is creative control by one or more wrestlers.
For example, the demise of WCW was seen to be at least in part because men like Hollywood Hogan and Kevin Nash used their creative control to benefit themselves rather than the promotion as a whole.
This is what led to the infamous 'finger poke of doom' since neither Nash nor Hogan wanted to cleanly job to the other. It is also why Bill Goldberg's undefeated streak was ended by Kevin Nash, despite Goldberg being the biggest star on WCW programming.
However, creative control doesn't have to be a be all and end all thing. Wrestlers can be given more control over their character development or match pacing without having similar nepotistic situations like Hogan and Nash brought to bear.
Daniel Bryan is currently being allowed full creative control, and he has used it to elevate wrestlers like Mustafa Ali, and even turned himself heel so he could help build more babyface talents in the company.
If WWE loosens its grip on creative control, it may be able to retain more wrestlers and avoid a talent exodus.