The critics group, did contain some good singers,whether they were elitist is irrelevant,what they did, was try to make suggestions to people[who wanted criticism] as to how they could improve their singing,that is a good thing,whether their criticisms were right is another question,their intentions were good.
Personally I never felt it necessary to join them.I did ask people for advice [such as Isobel Sutherland],in the end Ithink more can be acheived[stylewise] from listening to good traditional singers like PhilTanner and Harry Cox.
I always thought MacColls presentation was very good,the same can be said for Roy Harris,the best way to learn[imo] is to observe other good performers,this can be done without forming a group such as The Critics.Dick Miles