re: Used Extra Hot Rotel in my Shrimp & Corn Soup...any way to tone it down?

Add more dairy. You could also try adding some coconut milk. A sweetener will help as well...maybe a little honey, but taste it in between adding new ingredients. Diluting it is the only sure fire way. Could add more of whatever stock you used. If you have the ears of corn still, simmer them a bit and add corn stock.