"This would be 45 NM in direction 327 degrees from the last known position of MH370 reported by FR24, indicating some kind of flying ability"
Not so - at Lockerbie debris was scattered for mile forward of the point the plane came apart - - 7 miles and high and several hundred knots means the parabola of bits can be pretty significant.
But MAH370 was traveling roughly NE, so 327 degrees is about a 90 degree left turn. Also given normal flight speeds debris won't fall 45nm from any break up.