I have no problem with people having different theories about the world than Buddha. But I have a problem with people saying their theories about the world are what Buddha taught. To get rid of interpretations as audacious as Buddhadasa all one needs to do is read the Samayuta Nikaya, the volume that explains the doctrine of the 5 aggregates. Such theories have nothing to do with what Buddha taught. There is no point debating with such theories because they are simply another story just like christianity or islam is another story than what is written in the Pali Canon. If someone comes and says "this is actually from the pali canon", all one can say is "go read the pali canon to see it is not so". This is the same reaction I have when seen such theories: Just go and read the pali canon.
Most people read only the first sutta (the one with the 12 links) from chapter 2 of SN and expect to understand a 2000 page book by reading just 3 pages. This is like a person reading 3 pages of an engineering book and then start debating with real engineers who have read the whole book and had contemplated it for months. What one has to do in order to have any chance of understanding dependent origination is simply read what Buddha had to say. Stop reading books about what others have to say about dependent origination. This was Buddha insight so go read the book about what Buddha had to say. And he had to say quite a lot since there are about 1500 pages on the doctrine of the 5 aggregates alone.
If you do not agree with the Buddha, then do not follow him and follow another person. But at least read what he had to say before throwing him at the garbage and embracing some famous bhikkhu. Let's not forget "buddhism" comes from "Buddha". Buddha was the person who got all this thing started in the first place. Why not read what Buddha had to say ?