First of all, I love the E bodies. I think they are an absolutely beautiful car and I would like to get one again. Funny story though, when I was a kid my first car was a 66 GTO. What a great car it was, very solid and drove great, super reliable year around (yes winter too with studded snow tires). Then I sold it and bought a 70 Challenger. OMG, it was terrible compared to the GTO, cheaply made, tin can and lots of reliability problems. It just seemed so cheap compared to the GTO, so I only kept it a few months and then sold it and bought a 68 GTO. Again the 68 was very solid like the 66. Funny thing is now I want an E body again.
I agree, I think ma mopar was trying to play catch up with GMs camero/firebird but by the time they got into production, GM already moved on to the 2nd gen.