Yeay! i just finished too!
And i too agree that the book seemed to b written differently, but i couldn;t put my finger on what it was. (btw did anyone notice how many times people were saying 'oho', it seemed to be all the time or was that just me?)
As for the initials the first name that i thought of was regulas too, but i don't think we're told his middle name anywhere to confirm if its an A or not...
And then there's the whole death thing,...i agree that it felt slightly rushed(infact i thought the whole book ended slightly abrubtly) but, and this will make me sond bad lol, i was more upset that it was snape who killed him than the fact that he died. Because i like snape, and i actually quite like malfoy too (yes i know, how?) so them being the baddies i didn't really like, but i have a feeling that they are actually good as there was the whole malfoy and myrtle thing where malfoy seemed upset about having to do it, and snape had to do it due to the vow but then again i could just be wishful thinking....
Hmmm...i'm sure there were more things i wanted to point out
oh and i like the tonks lupin thing too! so sweet! (but yes i think there was a little too much 'couply' stuff in the book but it looked at the end like ron and hermione might finally....yeay!)