If Butler leaves they might actually get someone that fits better.
Yep, Butler is an aggressive, tough competitor, very talented, but also a headcase who causes friction everywhere he goes. Maybe he and Kyrie could team up in LA with James and have the most self-centered, self-important roster in the league. Think of all the barely disguised verbal shots that could take at each other and their coach after bad losses, while proclaiming themselves basketball geniuses and saviors of mankind.