The list of achievements in my above-mentioned paper is simply too long to be detailed here. The ‘Principle of Least Action (PLA)’ comes closest to the ‘theory of everything’ in physics, and from PLA, all known laws of physics can be derived. PLA can be generalized to ‘Principle of Maximum Proper time’, which is just the Minkowskian version of the Euclidean statement “The least distance between two points in (hyper) space is a straight line”.  
My paper also explains why dualities like wave-particle duality, or Lagrangian-Hamiltonian duality arises. Duality is a bedrock concept of modern physics.
The crucial conservation laws of Physics arise from symmetries of nature (as per Noether’s theorem). We can directly see from this simple structure of our universe, why those symmetries (e.g. homogeneity and isotropy) arises in the first place.  
Nature, the ultimate judge, has stamped TOTALLY APPROVED on my paper.