I saw that about a year ago I think, they did "spruce" up some of the shots. I DO wish they would do this type of work more often on the STNG remastering.
They've constant said the TNG remastering is not about adding in a ton of new HD CGI space battles. That would be too expensive to do for this kind of project.
Not sure how they are going to handle later DS9 seasons or the entire VOY series, which would required all that.