With regard to the amendments, I can understand some desire to see them in advance. I'm going to make a suggestion that I have no authority to make.
The problem is that we're asking witnesses to appear. The point is to test their evidence. The point is to hear what they have to say. Believe it or not, they may get some benefit from our questioning as well.
If the suggestion is that they submit their amendments without prejudice to bringing further amendments after the evidence, then I think that might be a reasonable common ground. Is that something people can live with, the idea of amendments without prejudice to bringing additional amendments afterwards? Otherwise, the whole process of taking evidence is a joke. Everybody has made up their minds and we aren't doing serious work.