Hi, Joy-
Great, glad that worked.
Personally, I don't think adding/subtracting options like "-giant_move" across a dataset analysis matters, if the quality of final alignments are all similar.
However, changing the regression model---not including the derivatives of motion now---would be the kind of change that would require re-running across all subjects. Everyone should have the same model specification run. (Note that this would also give you a chance to generate similar QC HTMLs, to help the systematic review across all subjects, so that would be a silver lining.)
-pt
