not sure how much an iskander maneuvers in terminal approach. it might not be all that much. hgvs and whatnot are an entirely different thing and something thaad wasn't designed against. also as i understand it the entire point of the high interception is to hit the incoming threat at an altitude where it can't maneuger much as the atmosphere is too thin to really provide much lift.    see above, you can't really blame the thing for not being well suited against a new generation of targets.
Portugal