I figure you really wanna keep the foiling cause the flavor was what everybody liked.
So, the best advice I can give is to go 250ish and try the 321 again but when you take them out for the last hour DO NOT take them off until they pass the bend test like bludawg posted.
I like my ribs 275 till they are done with no foil, but I do spritz and add some fine ground rub towards the end. To be honest though....that Johnny Trigg method you're using does make for some tasty ribs.
As far as candy vs savory......hell I eat'em all!!