Nico Sturm has utility, as a faceoff specialist who will not embarrass you too much 5v5 on the fourth line.
However, Sturm is not actually good. He's a barely passable starter on a good playoff team (as in, if he's your twelth-best forward, you're not in bad shape, but ideally he's #13 on the depth chart). He gets hurt a lot, he's capable of taking advantage of chaos around the net but doesn't generate anything himself (so he is utterly reliant on that chaos to produce anything), he's ok defensively but nothing special. He wins faceoffs, which is nice and has utility.
However, he's playing under ten minutes a game on the worst team in the league. He's been passed on the penalty kill depth chart by Barclay Goodrow, Luke Kunin, Ty Dellandrea and Collin Graf. Winning faceoffs is nice, but Sturm is not good at all at maintaining possession (whether personally or as part of a group) once that faceoff has been won. If he's taking faceoffs in the defensive zone, he is reliant on his linemates to do all of the work of getting the puck out of the zone, and if he's taking faceoffs in the offensive zone, all he can do is park himself around the crease and hope that someone else shoots for a fortunate rebound or uses him as a screen. I don't watch Florida so I don't know how good they are at clearing the zone, but Sturm is not going to help with that very much.
Ideally, he's playing only a handful of playoff games.