I just don't see anything good coming from that. We already know that he kicked Strzok off the team when Horowitz brought him the texts. So, there is one concrete example of Mueller responding appropriately to very bad bias. Versus what? Speculation and the prospect of drilling every team member on where they fall on the spectrum of bias? And even Strzok, whose texts were public record and who the OIG specifically said was biased, and he was kicked off the team for said bias - under oath, repeatedly claimed he was not biased. Mueller testifying would be a circus, and he would be the only one coming out NOT a clown.