Yes to everything beside Moriarty, I really didn't need to see him again. BUT the Sherlock/ John/ Mycroft dynamic was so perfect. I don't agree with the script in many scenes but I enjoyed the episode and I feel closure. If there'll never be more, it would work for me. On the other hand, the door's wide open to start with cases now that the character development and backstory are done with. I'm a happy fangirl. :)

PS: They must know what they do to us, when Sherlock tells "Greg" to look after Mycroft, they must. <3