SBF:
The main issue I bring up is made worse by quantum mechanics but will also be present using purely classical mechanics. I think it is easier to discuss it using classical mechanics so let's just suggest there are no quantum effects and nature is 100% deterministic:
Plus my very rudimentary understanding of chaos versus classical mechanics suggests there is a problem with your suggestion that uncertainty at a micro-level due to chaos theory is multiplied as you go up. As I understand it, classical mechanics largely "works" precisely because this chaotic feature of reality is not multiplied up the scale, but tends to be cancelled out at the macro-level. The macro level at which human beings exist and function.
The problems I have outlined above are a fundamental consequence of how the laws of nature works. You can show in general that many equations will exhibit chaotic behavior, i.e. small perturbations in the initial state of the system grows exponentially as the system evolves. That is true about most interesting systems on earth including the atmosphere. The rate of exponential growth is governed by what is known as the Lyapunov exponent:
https://en.wikipedia.org/wiki/Lyapunov_exponent
You can of course ask if this theory applies to a decomposing body, however the question would be yes unless the body is frozen: The problem is the atoms in the body would interact with known chaotic systems, weather that is groundwater percolating through the earth or the air, both obviously chaotic systems.
This conclusion can only be altered if steps are made to preserve your body like freezing it.
On the other hand, if you are saying the universe is deterministic in itself but we can never measure it well enough for it to divulge its secrets, I am still left wondering how do you know?
The problem is not that we can't measure the universe well enough *at any given point*, but that to predict the past (or future) increases the level of precision required exponentially: I know that because it is build into the laws of nature and can be demonstrated mathematically. It is the fundamentals of chaos theory (see the wikipedia page).
That creates all sorts of issue for the resurrection like the simple fact QM puts an upper limit to how well you can measure things (Heisenbergs uncertainty principle) or that some information is bound to get lost (photons emitted to space).