My problem with Origin is exclusivity. We all know their excuse for pulling all their games off of Steam of "we want to provide customer service that Steam gets in the way of" is bullshit, since we all know EA doesn't provide customer service, no other developer or publisher has ever complained about the things they criticized, and they just wanted a reason to force people to use Origin. That's my biggest problem with it, EA is using exclusivity to attempt to steal customers from Steam rather than do it by providing actual quality service. Now granted, all Valve's games are exclusive to Steam, but the difference is Valve actually made those themselves. EA doesn't make games, they buy out developers that would have probably wanted to sell their games on as many platforms as possible, and blackmail them into exclusivity contracts or refuse to fund their development. That's the other huge difference, Valve CAN'T buy out developers and force them to use Steam, EA can and does. If EA hadn't come out and lied about why they pulled all their games from Steam, and were in fact still doing business with Valve, I would probably be much more receptive of Origin, and might even purchase a few things from it. I only use it now because I have to to play ME 3.
I believe the more Origin gets used, the more EA will continue with this practice until they've effectively set themselves up a monopoly, which would empower them to continue with their price gouging and poor customer service. Even if Valve did hold a monopoly (they don't, check out Beamdog and Impulse), Valve seems to want to promoted a pleasant, accessible environment for gamers where mutual benefit and awesome sales drives customer relations, whereas EA would probably just continue to be greedy and force the $60 price tag and defile gaming culture with tone-deaf publicity stunts like they always have. Notch seems like a reasonably smart guy, but when you trumpet catch phrases about free markets and competition like they are universal, infallible truths without taking into consideration the specific players involved, you just look dumb.
I realize a lot of what I said is speculation, but I don't think any of it is much of a stretch considering how long EA has been around and in the spotlight for their reprehensible business practices.