Jacob is mostly playing peacekeeper to avoid pissing anyone off xD

Also, the interrogators may or may not use Aproveset on Iris during the first interrogation. Generally, they have to get permission to use the drug, since they only have a limited supply, so they try to exhaust other methods of extracting information first. There's also no rule against using Aproveset during the first interrogation of a prisoner though, so it could still happen. You can handle it however you want :)