i kind of wish emotional deaths were easier to achieve-- they're too hard as of now and i think they make gameplay more interesting. i also think there should be more than just 3. i will always advocate for the inclusion of more ways for sims to die. the more the merrier.
i don't really get it when people complain about their sims dying; it's a life simulator, and there can't be life without death. but that's just me. if you want to keep your sims alive forever, cool, go for it, but it's your responsibility to achieve that. if your sim gets to the point where they might die of hysteria, mortification or enragement and you don't stop them, it's kind of your fault. plus, if you're one of those players who wants to let their sims live on forever (nothing wrong with that, play how you wanna play), then utilise the saving system.
basically what i'm trying to say is that the emotional deaths are so easily avoidable. they don't just happen out of nowhere, they happen because of a build up of moodlets, moodlets the player is practically entirely responsible for. if you don't like emotional deaths, you can avoid them. simple.