The Grand Alliance gambit pretty much forced the hand of the RG. I think that you did the right thing in attacking me, given the ranking system. The convoy was in your self-interest and I don’t begrudge it too much, in retrospect. If you had succeeded I could see you as being the third party to the draw instead of me.
Small chat played an important part in the my relations with both you and Italy. It formed a bond strong enough that I chose to continue to support Italy for a while longer even after Hugh signaled strongly that he wanted to ally. This was an early handicap of Hugh’s in his communication with me early game, but the handicap lessened as I became more comfortable with the medium later in the game.
At the time of our conversation, though, the prospect of a Grand Alliance was quite frightening. I still have the draft of an angry e-mail to Hugh telling him that I wasn’t going to stop the Western Alliance and that he’d better stop talking to my enemies and act like a real ally! Fortunately, I saved the draft, slept on it, and woke up the next morning and realized how stupid it was.
One reason Harry might not use the killing curse is that he wants to avoid the slippery slope that Mad-Eye warned of—once a wizard has used the curse once, it becomes easier to do so in the future.