#2 It will give every match and story time for an adequate pay-off

The WWE has 16 matches planned for WrestleMania 35, and outside of the main event and the WWE Championship match, most of them are going to struggle for time, and it will certainly hurt the quality of the show.
On paper, each and every match at this year's WrestleMania offers something different, whether it be the historic Triple Threat, Kofi's 11-year chase to the top, the rivalry of two old friends turned foes, and others - but without adequate time, some of these will fail to deliver.
With two events featuring 7-8 matches each, the WWE will allow each match to tell the story they want to tell, and while that may make both events quite long, it makes it easier for the performers in the ring to have their WrestleMania moments and win over the WWE Universe, something everyone deserves.