I think Lewis does a professional a job given he is a volunteer, so no complaints there. I don't mind Stuart chipping in with his opinions. I think of him as someone random you would sit near in the stand shouting his three penny worth every now and again. Sometimes annoying, sometimes funny, sometimes inciteful, sometimes superfluous.
Must be really crap giving your time, doing your opposition research, learning the players names and have a bunch of folks nit-picking everything that comes out of your mouth. I wouldn't/couldn't do it better. Can you?