Quality has dropped a lot. Because the users who used and created content the most used 3rd party apps. Their absence has decreased the quality of reddit a lot.
I'd imagine there are some people who feel tied to their Reddit accounts because the awards and karma were important to them, so stripping anything like that away seems like it would make those people feel less attached to Reddit and more likely to move on.
Not only that, but they'll probably be angry on reddit as well.
I'm still using Boost.