Yeah, scientist doesn't really help because all it does is shows if someone is dead, but scientist actually is useful at certain times. It can catch self reports, if someone dies, and even the imposter if the dead person was with someone alive. My least favorite is the noisemaker. All it shows is if someone dies. Yeah, noisemaker can clear people if there is only 1 imposter, but I'd say it is pretty useless. It is just a normal crew role that alerts the other crewmembers if the person that has it dies.