transmission89
Hero
Except those death saves are explicitly there as a death safeguard.I'm not sure that the general market doesn't want it. As has been pointed out, WotC did a survery for 5e and included the risk of death as a default part of the game. That would indicate that the market wants the risk to be there. They also made it very easy to avoid, so it also indicates that they want that risk to be minimal, but not non-existent. If the majority of the market wanted it to be gone, the death save and instant death mechanics would be optional rules, not defaults.
But again, it’s easy for you to test, don’t even switch to a different system. Increase the lethality of your 5e game (as per the op). Same game, same conditions, just tougher encounters with increased chance of death. Interview your players after a few sessions, what’s their feedback going to be?