It was brought to my attention (not directly, but through a couple of comments and questions), that Canceling an Action under Special Situations in the Combat section actually is more along the lines of "Canceling All Declared Actions" and it doesn't take into account the idea of only Canceling a part of your actions.
The original question involved a player who declares that he will make a Missile attack (2 AP) and then Reload (3 AP), who then earns a Boon Point and wishes to do a Rapid Reload. The question became -- "What about the Reload action? Is it just wasted? Can another action be declared? What?"
So, before I make any decisions, I want some feedback...