Do the crops that are underground get affected by the weather and seasons? Imo they shouldn't. But if we're going to talk about weather and closed spaces, we can't avoid talking about greenhouses. Also another great thing would be that the crops don't die, they just stop growing or recede because replanting is hell.
Few questions
1.) What about the casual players who rely on protection enchants and sharpness?
2.) How are you going to remove speed potions? Making them non-existent makes horse travel waaaaay worse.
I get it if most of the features that you would be getting rid of would be only disabled during combat time (or just not allowing players to war with them) .