You make no sense. That's like saying you're a huge fan of JFK but your glad he's dead.
Considering how badly a crap load of characters have been written over the past 8 years at Marvel and DC, death is sometimes a viable alternative to being written horribly.
Quite frankly, if Quicksilver got a Barry Allen style death in AvX I'd be glad to see the character RIP, simply because no one is going to write him as well as PAD and Ostrander did, ever again. He's always going to be the lonely Speedster who doesn't try to get past his demons to become a better person, when he was better than that in the 90's.
Taking that into consideration, taking Pietro off the board with a heroic death wouldn't bother me that much.