Since you've asked in a civilised manner ill try to respond in kind. Not everyone likes change. It's scary. It's unknown. It's scarier because it's unknown. But, it's the future. Because year 1 exotics and legendaries are being left behind, everyone seems to be on the assumption that year 2 will be pure fisticuffs with no new weapons to use. Before Ghorn became the default heavy, was the game played? After ghorn was sold by xur, did the game break? I don't think the issue is which weap is upgradable vs not. I personally think the issue is people don't like accepting change straight off the bat. This isn't new to either Destiny or gaming or even the human race.