Sir
First of all my sincere thanks for taking time to appreciate a new perspective. Though I was a skeptic on such things a decade back and ridiculed any such stuff I came across (as I am writing today), I think we have somewhere messed up and lost a good amount of knowledge. I am no historian and cannot say what happened, but I understand now that Vedas are not words of soma drunk seers.
Actually the functions of trinity are well represented in Brahma, Vishnu, Shiva. (But that is not the 'reason' why I mapped them with Gravity, Inertia and Energy).
Brahma as HiranyaGarbha or spacetime is the first one to be 'created' or 'formed' in the Universal evolution. Inside this spactime further creations take place.
Vishnu the Inertia as the re-born Atma, as a property of matter, is what 'preserves' the Universe. It is a fundamental property that sustains the Universe as we see it now. To be at rest, when in rest and to be in motion, when in motion is actually 'PRESERVING'.
Energy is the 'form' of this Universe. All matter and beings originate from this 'Energy' and go back into that Energy. Universal matter evolution that started as a bundle of energy with a Big-Bang may end up back in the same form. As I wrote in this blog, the 'dance' of Energy on spacetime curvature (which is a scientific fact, not my imagination) is all what this Universal matter is, from its birth to death. Hence Shiva represents that origination to dissolution.
These could be simplified as Creation, Preserving and Dissolution in a 'Western' way of thinking.
-TBT