I think you overestimate his problem. Domalino thinks he might have some personality issues, but if that's not the case, he is very teachable. His technique is good. Its his decision making that needs improving.Unfortunately pep doesn't have a magic wand
Really the goal here is to teach him to do less. Its actually one of the simpler fixes out there. Be has been on the wrong teams too long, and he is being type casted.