Maybe you're right on 1-4.
But 5 is a madness. I understand that it can be frustrating for a fresh 50 to be instakilled, but it doesn't mean combat system should to be screwed for their sake. What you suggest has so many flaws.. starting from just more complicated combat, screwing specific classes (e.g. operatives would unsub) to screwing whole stat balance (everyone would stack dps stats, endurance would become bad for pvp).