The one thing I will say is that there is an easy way to deal with what Ma Long is doing, but the problem is that at that level, you can only do what you train. Dima stood at the table in a way that made his going down the line too risky. With the right footwork, he can shut down that serve by giving himself the crosscourt and down the line option. This is what I suspect ZJK would have done or at least have done something to give himself a fourth ball opportunity.
Is this the type of shot and footwork that you are describing?