I'll have to disagree with you on a couple of points matey :)
In relation to the "sound processing" idea, Hendrix's use of pedals was very influential. No-one had done that before him, only the fuzz and wah really existed up to that point. The Octavia and Uni-Vibe were brand new inventions that started the who pedal thing off - phasers, choruses, flangers etc all followed. They are a big part of the history of electric guitar sounds.
Johnny Marr was a very influential guitarist in his day by all accounts. I never listened to his stuff at the time so I can't say for sure, but I believe he brought melodies back into guitar playing after the punk era. He's respected by a lot of guys and I thought he came across as a good guy.
I think the last episode moved away from the guitar on it's own, and more about how the combination of guitar/amp/effects can create a whole world of sounds. It was more of a "sound making" episode.
I will agree that Townsend is a pompous ass :)
And Les Paul isn't really the father of the electric guitar in my eyes. There were various people working in ideas around the same time that all contributed to it s development: Les Paul, Adolph Rickenbacker, Leo Fender and Paul Bigsby.
I'll let Les have the multitrack recorder though ;)