From NBC Insider (Intern) Here what Dan + Shay said about Saweetie
https://www.nbc.com/nbc-insider/all-about-saweetie-team-dan-shays-playoff-mentor
It seem that they are pushing that the Mentor is from another genre.
They were probably force to find something nice to say about the mentor altho in Maluma article John didn't say anything
https://www.nbc.com/nbc-insider/who-is-maluma-team-legends-playoff-mentor-on-the-voice