I hadn't seen this until you mentioned. Is the
mlssoccer.com article the only one summarizing/quoting his remarks on this? It's all I could find. It's kind of puzzling to me. Setting aside the POV that only MLS can coach MLS, if I am reading it correctly, Vermes attributes some of the lack of Kreis's success to not having MLS personnel, and Vieira's success to having MLS personnel:
"I think the biggest thing is that a lot of the changes that they made within that team are personnel, and the personnel are people that I think are more suited for MLS," Vermes said. "I think that's probably the biggest thing."
What personnel is he referring to? There's one assistant who was coaching USMNT U18 before joining NYCFC this year, and Vartughian stayed on from first season, but the other three coaches under Vieira are Manchester EDS guys that came with him. Or is he referring to FO Sporting Dep't guys?