#2 No part-time wrestlers
One of the reasons why there just seems to be something special about the NXT brand is that, from top to bottom, the entire roster is happy to be there and wants to perform their absolute best.
These are men and women who have dedicated themselves to pro wrestling, for whom each and every match isn't just a mere performance, or a paycheck, but a chance to add to their legacy.
Not to mention, every match is like a job application to move up to the main roster, because that's where greater money can be made simply by virtue of working pay per view events, which leads to royalties on DVD sales among other benefits.
But on the WrestleMania 35 card, you have athletes who don't really need wrestling and wouldn't be doing so if they weren't making fantastic amounts of money doing so.
Brock Lesnar simply isn't the same as he was ten years ago when he was a hungry man yearning for greater success. And Batista is happy with letting his stunt man do the heavy lifting for the most part outside of mega-events like WrestleMania.