The Problem With Quantum Gravity Theory

There may well be, there are lots of wild different models that have been proposed. The problem with these models is that we are not sure how to link them with somehow predictions that can be then tested. It would be nice to have a way of first experimentally connecting them with what we know at the scale that we can test. Oh, he has actually come up with some really interesting tests, but I don't think it's your theory.