I do not appreciate BnG, so I'm not an authority to say a solid opinion. However, as a scheme enthusiast, I think that if we ever add a real Sudden Death to BnG, it has to be the nuke one. Not sure the value, though. Since v3.8, we can set the value of the nuke. It could be a relatively early Sudden Dearh with small damage per turn or a late sudden death with a decent damage per turn.
In my opinion BnG games can take an eternity to end specially when there are newbies playing (like me - wtf is BnG?). So I'm in favor to implement Sudden Death. Even pros playing miss many shots. It's boring to espectate most of BnG streams, I'd say.
Although this would remove that vibe of going until the end, until hit enough damage or plop worms.
The best board games and electronic games have mechanisms to avoid eternal games or mechanisms that force engagement (avoid darksiding). In Age of Empires 2, the Wonder building makes pressure to a player attack otherwise it will loose. In Bomberman, we have sudden death that forces players to go to the center of the map until everyone is killed.
Worms Armageddon has multiple Sudden Deaths options. BnG is not a race. It should receive the Nuke. Worms will still stay with at least 1HP, so the final shot is still needed to win the game.
Monopoly sucks in Board Game Geek rank (26772) of board games because it is very unbalanced, based in a lot of luck, a lot of snowballing is likely to happen and the most important thing: it's endless to the point that players start to f@#! up the game and don't take it seriously. The true representation of capitalism. A meme board game.
BnG without SD is following Monopoly's reputation in my opinion.
Edit: another possibility is that we could just make less starting health to worms, for quicker games.