All the other post sorta like this are what will her friends do, but Spike is around her more. I know she still loves Spike, but how will he do anything when someone else gets it to her in a flash? It's not like Spike can fly or do magic.
I believe that you are correct with those assumptions! But I think Twilight and Rarity would be really scared without their horns. I mean Twilight would just poof the zombies away.
Dying would just, I don't know, mess it up! Turning into an Alicorn isn't really that bad... Except if the pony dying was a bad person or a background character. Nah no dying.