It sounds an interesting topic.
1) Can you show an example of the emotional sentiment of a sentence? If you use any reference to determine the emotional sentiment of a given sentence, please include the link.
2) Among the major components you proposed, what is the basic part and what is the extra in-depth part?
Determining if a sentence is grammatically correct (would a native speaker say this) is already a complicated task. Pragmatic analysis (other than in the trivial case) is even more elusive. I would start with a small domain of sentence types to handle and increase that domain as your "something extra". Define the problem further, i.e., whose grammar is going to be your standard? How are you defining context/common ground? Know that you can always scale down if it gets too hard.