The problem with Breath of the Nautilus

The Nautilus is a really useful mob and its effect is specially useful for underwater exploration, building and even combat, but the problem is... Then what's the point of the water breathing, conduit and the turtle shell?

Sure, mining is faster without a Nautilus and you can move and mine faster with enchantments, but it's still better to just use a Nautilus instead of waiting to be able to make a turtle shell (which is almost useless even if it's better than iron), farming for a conduit and getting prismarine to activate it, making or finding water breathing potions, etc.

I won't say you need to nerf the Nautilus. Maybe make it slow down your oxygen loss instead of stoping it or something like that at most. But the conduit and specially the turtle shell need a buff. Respiration is already really useful while the turtle shell gives so little that it's not even worth it and the conduit just has 2 extra perks besides water breathing (night vision and haste). Conduits are already pretty good for monuments and building but turtle shells specially should have more utility than just 10 extra seconds underwater cuz that's barely useful in any situation. Maybe 30-60 seconds underwater and some extra effects underwater or perks that work in rain too? Like moving more freely underwater like if you were on ground or like if you were flying, moving faster underwater and during rain, etc. Anything to make it worth the effort. Even a little of armor toughness could be useful.