How much more exploring the "Logic" thing could we really have done? Especially since we were also exploring the emotionless android man on the same show
True, but as you say Spock was basically the sole representative of Vulcans, and other Vulcans (whenever they appeared) for the most part simply followed the same stoic blueprint. I think ENT did a good job of giving us a lot more about Vulcans and breaking away from the Spock mold.