"The micromanaging of actors lines is not currently popular, but it does and has produced great results." When has it EVER produced great results?
Are you serious about Will Smith having a limited amount of "emotions". If you're calling it emotions, firstly, that already shows how much you know of the acting craft. Actors (serious students/professionals) don't go into saying "I want to portray an emotion". That comes after technique. Amateurs believe the opposite. An actor will ALWAYS produce only what he/she is, and there is a limit to that. Period. Look at any actor and you will see their reaction in one scene and I guarantee you, you can find that same reaction somewhere else repetitively in other works. There are only so many ways a human being can rejoice, celebrate, defeat, etc. etc. verbs. So the fact that you're saying a 'limited emotions' is immature and cannot be taken seriously. By the way, do you have an infinite number of emotions?