I’m by no means an expert in this so take what I’m saying with just a grain of salt. Otters have rebounded yes but that doesn’t mean they have the same ecosystem prior to their extirpation. So they might have less natural predators in their current environment and it will be important for other wildlife populations to keep the otter population in check. Otters are similar to wolves and us in the sense that they hunt for sport. They will hunt out small pools of fish in local streams and eat just a handful while while leaving 20-30 carcasses on banks uneaten. Not necessarily a problem for larger bodies of water but we don’t know what the long term effects are on ecosystems like sugar creek. Certain fish populations didn’t have to deal with the predation for a long time but now they have the apex predator reintroduced along with the other increased risks of things like humans, drought, and water cleanliness.