It actually is possible to reduce the ghosting, but it also depends on the properties of the scene and the way you set everything up. FXAA can be a better fit under given circumstances, but it won’t always work on scenes where strong edges are more apparent (eg structures).
The key to reduce the ghosting is that you have to restrict the temporal buffer to lower blending, and treat the flickering edges by weighting the higher blending factors to those areas. The entire content is actually flicker a tiny bit, but you just can’t see it really since the edges are the dominant contributors when recognizing the visual information and they remain temporally stable this way.