Ohhhh the dying sound. forgot about it. (Pandora drowns out all roblox sounds XD)
Yes, about the sound, I think it should stay the same. If one would change it, an "ow" would be the farthest out you could go without glorifying the character dying.
I don't mind the oof. :D But maybe ROBLOX should make it possible to change its pitch and sound for everyone in your place. Like if you're making a war place you'd probably want a deeper death noise or maybe a different one altogether
You can change the sound by changing the ROBLOX files in your computer.
Never tried it though. It´s the same as changing everyody´s normal face ingame.