I'd stick with Hunter, too early to drop imo -unless you're losing close games maybe. Check his QB pressures first, he could have a great game any week. I didn't get to draft him so haven't followed his stats, what are his tackle numbers?
DEs are up and down, Hunter has the talent but is off to a slow start, he's still a guy who will probably finish as a top 10 DE, remember sacks come in bunchs generally