Lio Rush apparently has a rocky relationship with multiple superstars’ backstage, specifically Finn Balor. There was one incident when Balor noticed that Rush’s wife was almost always around during training or other events specific to WWE superstars. Balor, attempting to be a friend and mentor to Rush, simply pointed out to him that Vince McMahon may not take very kindly to Rush’s wife being present so exclusively when she is not a member of the roster. Rush responded by getting very defensive and that incident, along with a couple of others, rubbed the locker room the wrong way.
It makes sense in a way because Lio Rush is reminiscent of a toned-down version of Enzo Amore (although the conditions surrounding his departure are a little bit different, with rape allegations and all of that mess).
Regardless of the presence of Lio Rush, WWE might want to make a concerted effort to maintain the momentum of Bobby Lashley. This could really help to bolster the quality of the product. It may be tough to accomplish with the mental energy of the creative team going towards pushing newer people like Ricochet, Robert Roode, the returning Bray Wyatt, and Lacey Evans, but Lashley is so much of a physical specimen. It’s been said that WWE can’t afford to relegate someone like him to Midcard mediocrity.