He was put in charge of this charade because there is nothing you can learn about him that would ever threaten his position in Congress. He'd still be re-elected by a wide margin if his cell phone records showed he was conspiring with Nazis to load Jews and blacks into boxcars and send them to concentration camps.
Schiff's standing is fine among his deranged base. But the independents look at him being appointed both prosecutor (conspiring with the WB) and judge (determining what evidence can be subpoenaed or suppressed), and will be disgusted by the charade. Nadler was supposed to write rules to prevent prosecutorial misconduct, but he shot down all the amendments that could have done that.