Should Remain in NXT #3: Kassius Ohno

Using the ring name Chris Hero, Kassius Ohno has enjoyed a prestigious career on the independent circuit. He's wrestled for PWG, Ring of Honor, and countless other promotions and has title reigns in the double digits.
Many also consider Kassius Ohno to have one of the best minds for pro wrestling in the business. This is why he is on NXT, to help develop the next crop of WWE talent. He also serves a 'gatekeeper' function, similar to one that Kane once served on Raw. That is to say, before wrestlers can move into the main event, they often feud with Ohno first (see Matt Riddle and Kushida.)
But those who have followed Ohno since his Chris Hero days often lament that he's not on the main WWE brands. Should he make the jump, or remain where he is?
Why he should remain on NXT: Chris Hero's accolades speak for themselves, as does his in-ring ability, but he's in the waning years of his career and medical conditions have robbed him of the speed he possessed in youth. Also, some unflattering videos of him fighting with fans at independent shows might cause problems if he had a higher profile.
Becky Lynch has been challenged HERE.