When batch-deleting filler words, very often the result is that the filler word AND any preceding gap (usually a natural pause or breath) is also deleted making for an awkwardly fast continuation from the previous word.
For instance, a sentence may contain the following: "<speech>, <breath gap>, 'um' <speech>."
If the filler word "um" is removed manually then that is the only audio removed. If batch-deleted by the filler word tool + edit optimization then the <breath gap> + "um" will all be removed.
This makes for less natural sounding edits that I then end up going in an adjusting. If the batch filler word tool worked the same way as the individual word deletion tool then it would be better. Please change the default setting for how the batch filler word removal works or make it an option to change.