it's a monster with branches everywhere and looks nothing like the original. I'm wondering if somehow cloning pretty deep into flower could slightly bring out or change the genetics a little
It could but its extremely unlikely. More likely, the "genetics" haven't changed, only the plant's hormones have. Cannabis has different hormonal ratios during different stages of life, and they typically guide the plant's life cycle from veg to flower to death. But in the case of a reveg, we increase dark hours to 12 hrs (or whatever the photo trigger point) AND WE TRY TO KEEP THEM ALIVE. This is something that doesn't happen in the wild, at least very infrequently. So asking the plant to reveg requires a hormonal shift that reverse from its norm, and plants typically take a while to respond in a visible way.
For all annual plants like cannabis, shortened day (or longer nights) typically cause fruiting and then death. The ability to reveg is possibly a genetic remnant that allows the rare plant to survive mild winters, in very rare situations, to reproduce again.