Not really. Compare him to a good 4th line center like Colton Sissons, who outdraws him by 1.5%ish, usually draws the toughest opposition assignments, only put up around 5 points less per season, and makes only 2.875M per year (and is still overpaid for a 4th line center). As a "good 4th line center" Dvorak is not just overpaid, but horrifically so.
FWIW the Preds have awful center depth on paper in Parssinen, Novak, Glass, Sissons, (Johansen), and plenty of cap room, and I couldn't see us giving up more than a mid-late pick at best for Dvorak, if that. I don't see much of a market for him other than a contender trying to add depth at the deadline.