#2 Keep the catchphrases and nicknames to a minimum
WWE is obsessed with the catchphrase and even more obsessed with the nickname. If you had to do a shot of whiskey anytime the name "Lunatic Fringe" or "Scottish Psychopath" has been said on WWE TV, you'd need a liver transplant nearly every week.
Furthermore, WWE does not need to force a catchphrase on Kevin Owens in order to make him a successful babyface. The "yes" chants created by Daniel Bryan were organic, Steve Austin's "what" line (which is now universally loathed due to repetition) came from something Austin was really connecting with. But when WWE forces some type of catchphrase on a character it rarely has the potency of something the audience recognizes as more grounded.
See who is stunned by Hulk Hogan's words HERE
The new Kevin Owens should focus on hitting the audience with his truth, and over time some unique catchphrases and even nicknames might arise out of the natural progression of KO's character.