Of course, the fact that he decided to have T'Challa have the suit at all back then is somewhat of a continuity problem since he establishes he had the suit prior to his first encounter with the FF, yet strangely doesn't bother using it again until post Secret Wars. Might have been easier to just have him not have the suit.
But that's a nitpick. He handled Killmonger well, in keeping th the undefeated streak alive without making T'Challa look bad. Though it's sort of funny that despite T'Challa losing to Killmonger a couple times, Shuri arguably defeats him the first time they meet.