I’ll be interested in seeing what’s there when we actually dig up concrete stuff, but the speculation is a bit much for me.
There is very little speculation going on.
The U-wing with the green Laser Grid stealth mission is talked about in the Concept art of Rogue One The story board has it landing near a herd of some sort of Oxen or cows running away as the ship lands.This is from Gareth Edwards.
Galen Under the broken Land speeder is in the Concept art book story boarded and the Visual Guide shows the full finished prop
The Shots of Jyn and Cassian being arrested by Storm troopers is in the trailers and a featurette
We know that Galens death scene was altered and that “Stardust” was put in also this image below should tell you that something was “Changed” about the sequence.
There is Concept Art for the Partisans x-wings fleeing Jedha and it’s also confirmed as canon that some of them escape. I imagine it was more a plot point to increase tension as a perhaps one or 2 of them being destroyed as the U-wing escapes. The art showed 4 of them. You can see the black x-wings in the film if only briefly. Moroff is seen on Scariff in a featurette that is in the Maldives not on a studio set.
There is very little wild speculation going on… Guess the re-shoot well that is more tricky unless Gareth tells us.
Plenty of Deleted scenes which could go in any version. Not seeing many alternatives at least yet.