#4 More pay-per-views with the title
It certainly hurts the brand when your champion does not appear on every show. It is especially bad for the smaller pay-per-views where the Intercontinental Championship is RAW's top title being defended. Now that Roman Reigns is the Universal Champion, this won't be the case any longer.
Reigns can now compete on every single pay-per-view that WWE puts together this year, with the exception of 'Evolution', of course. He can tell long-term stories with other stars in the brand, much like Rollins and Ziggler are doing with the Intercontinental Championship. Most importantly, he can bring back the excitement that was lost during Brock Lesnar's reign.
How often does it happen that WWE puts together a B-pay-per-view, and none of us are really ever excited about it? This is set to change with Reigns as Universal Champion.