I’ve never had a problem with ext4 after power failure.
Zram is not a substitute for swap. Your system is less optimal by not having at least a small swap.
Firewalls should never default to on. It’s an advanced tool and it should be left to advanced users.
Not to mention how much grief it would cause distro maintainers. If they don’t auto configure the firewall they get blasted by people who don’t know why their stuff isn’t working. If they auto configure they get blasted by people upset that the auto configurator dared change their precious firewall rules. You just can’t win.