Sophos doesn't have to kill every process that is identified as suspicious. Ask if your IT will change the behavior from blocking to simply warning. If I'm not mistaken, the default Sophos policy for suspicious files is "Do nothing" (other than warn and log), so a "general solution" would be to go back to the default policy.
Only if your industry is very sensitive, like finance or medical records, would blocking by default seem like the best policy. Around here, 100% of "suspicious" stuff has turned out to be benign, so we just warn, log, and authorize (so that warning and log noise goes away).