Should not end the brand split: More titles means more wrestlers are recognized

A funny thing happened to WWE in 2015. After the Shield split and Reigns was considered the face of the company, the brands split as well.
Reigns was the Superstar, and should have been the one being a top draw at live shows. But the WWE discovered that shows headlined by perennial mid-carder Dean Ambrose were outselling those headlined by Reigns.
Their solution was to put the big belt on BOTH men--a solution that was only available to the WWE promotion because of their brand split. This way, they could recognize Dean's contributions to the company, take advantage of his booming popularity, and prevent damage to Reigns's image all at once.
Had the federation not split itself into two brands, Dean Ambrose's title reign may not have happened--and you can say the same for AJ Styles or anyone else who has held the blue brand's title belt.