I remember two final strikes in my five or six years playing. WhenI first started, FS was used almost constantly whenever a wedding ceremony was taking place, including one I attended. There was little RP (though it was an adept FSing a Lighty wedding) before or after, and it just pissed off a lot of people.
The second one was this one time when the MC (or maybe adepts, Falicis and maybe Inidil and someone with Matron Ventaro, plus some others...) attacked Sith'a'niel. I played Cian, in the Knights of Selkwood... and Camby, Kazan, and Furil were about, defending.
The battle wasnt going well. I died,and Furil died. I got returned quickly, and went to grab my corpse. I got it, and when I went back to the city gates, (which I had heard kazan say they were going to over CB) I found like, five MC bodies, the matron's body, Kazan's, and perhaps Camby's... I do not recall. I was totally confused... and then kazan told the story of Camby giving his life for his kingdom, and his people. (Camby was titled King of Sith'a'neil)
It was the perfect RP for the character, and the perfect use of the spell. It is the epic spell that Benzo mentions, and that was one of the most memorable times I've played this game. So, yes. I think the spell should stay.
God, I ramble.