Will the inclination of the grandfather's grave tablet in front of the incense burner affect future generations?

I have some knowledge of Feng Shui. I can tell you that your problem has no effect, as long as it is corrected in time. In order to make ancestral graves benefit future generations, it is no exaggeration to carefully measure the location and find a good hole. It is as important to have a yin house as a yang house. Some people even say that "Yang Zhai" can influence one generation and "Yin Zhai" can influence several generations.