I get where you are coming from but for me, there is a lot more replay value in something that is difficult. If I can just melt a boss, I don't want to do that mission again. There is no challenge and it is boring. I'd rather have something like the raid that is somewhat difficult each time you do it so you can get better and better at executing what you need to do to make it easier. Not so I can get a gun that melts a boss then just walk through the mission.