<p>I have two roommates that were ENVM majors coming into Poly also, and one successfully switched to Psychology and the other to Rec, Parks and Tourism Admin. </p>
<p>I switched from Psychology to Business successfully. It’s overwhelming, but not as terrible as Cal Poly likes to make it sound. I just think they don’t want everybody switching. 
COMS should be an easy switch. Good luck to your son!</p>