Yeah I feel as though the plan of only slightly mentioning T'Challas super Genius by having him design how CW habit was a mistake. I would of actually made a point to atleast establish that T'Challa designed alot of things prior to Shuri. Big stuff like infrastructure, shields cloaking technology etc. Big stuff designed to protect Wakanda and it's people, or military might, should fall onto T'Challa. The other stuff could fall to Shuri. But I don't think it makes sense that Shuri would be designing military and protection tech when the protector and dude the franchise is about is capable of doing that, especially since before the movie he wasn't king yet