Rocket had a very specific vision for DayZ Standalone: a huge focus on hardcore survival, environmental storytelling, and the overall aesthetic and feel of the game.
Much of what you've mentioned doesn't fit with the game's original lore.
Many people prefer a different experience, that's where mod support comes in. Some servers, like The Labs DayZ, have completely different gameplay loops.
There's no point in changing the vanilla "experience". That's why projects like Arma 3 Exile exist, and why similar projects could emerge for Arma Reforger and Arma 4.
Regarding DayZ 2, I'd compare it to Hunt Showdown's engine overhaul. Why remake a game when you can continue supporting it?
Remember DayZ Standalone's early access launch? It's hard to imagine the game reaching its current state.
It's made significant progress, there's no reason to stop now.
Bohemia is actively hiring multiple key roles which are directly related to DayZ development.
I'm hoping for a major overhaul of the game once Arma 4 is released and the Enfusion Engine matures.
If such an overhaul breaks mods, so be it. They will eventually get remade, and a legacy branch could be maintained for existing modded servers.