It's hard enough as it is. It also makes the Will actually mean something for the Executioner, meaning you can fake claim who was your target or not. Cuz honestly, when the Exe dies, he has no reason to interact with the game anymore. His win condition is dead with him. At least he can mess with a Medium or his Will to try to keep his real target from being confirmed. As it stands right now, he has 0 reason to keep that information private, as his game is over. This is an issue with some of the evil roles; they have no reason to stick around or play the game to its conclusion. This exact situation came up earlier; I died, but my target was lynched after I died. It's a real bitter feeling.
Also, the Retri should be able to revive dead Disguisers who are disguised as Town. Just a thought.