I think what’s maddening people the most might be the fact is the fact that any game will require an online connection at least once a day. It’s true some games and services already offer that, both on console and PC, but it isn’t compulsory. The freedom of choice is gone like this. The fact that we can’t borrow a game without paying for it is a major major factor that no one will like. The only ones not to care much about it are the PC players as they already have this implemented and seems to be working out. But let’s be honest, the PC gaming market share is probably a fraction compared to consoles (maybe over exaggerating).
It’s true that if it doesn’t suit your needs then don’t buy it, but some people have invested heavily in an ecosystem like Xbox Live and giving all that away because the company has changed strategy and it’s either do what they say or just don’t at all isn’t nice in my opinion.
The vagueness of their reports are most probably because they don’t have a final plan and need to monitor reactions. This is why I believe that it is very (VERY) important to keep bitching about it and hopefully the critical assessment will deter them from making such a strongly disruptive decision.