What makes the line in “Q-Less” so notable is that Q himself is calling the techno-babble out by name, describing the problems Sisko and crew were facing as mere “technobabble” to be “solved.”
Appropriately enough, Q is basically breaking the fourth wall here and reminding us that to the writers, the most persistent problem was creating techno-babble that would convince the audience their characters had finally figured out how to solve a problem. As for the staff, they took “glee” in this line because it communicated that the Star Trek writers often found the babble just as annoying (if not more) than skeptical audiences.