#1 Ratings are only going downhill
The biggest reason why WWE should get rid of Lesnar is that the ratings are still at an all-time low.
Last year, the ratings reached a record low and a desperate WWE tried to shake things up by calling NXT names onto the main roster and firing the bland general manager, Baron Corbin. This didn't help matters much, and it's clear that Brock being WWE's top champion isn't doing the company any favors. Things could get worse after Mania is done with.
WWE should focus on building up top stars who can go on to main-event future WrestleManias. There are a bunch of guys down in NXT who are destined to achieve in-ring greatness, only if the higher-ups go out of their way to promote these stars in a proper manner, and not put their eggs in one basket, like how they did with Lesnar and Reigns.
Also Read: 3 possible finishes to Rollins vs Lesnar at Mania!