It's the murphionic thing that I see as the biggest problem. Though even Harry was able to design something to suppress that, way back in DM; his only failed because Harry lacked sufficient emotional control, an area that LTW is supposedly particularly skilled at. So if anyone could design a charm to prevent an SC level wizard from exploding all the computers and sensitive medical equipment, it would be him. Or maybe him with the help from a master magical crafter like Mai.