I think the complaining about fastlane is completely overblown.
I wasn't there on opening day, but I would imagine the waits were simply due to the opening day crowds. I can remember waiting 45 minutes for Blue Streak one year when I visited opening day. Yesterday, the lines were really short all day, and only once did I spot someone using fastlane, while walking through the Magnum's queue. I don't think any ride was more than a 30 minute wait yesterday. Near the end of the day, Maverick was a near walk on.
From what little I've seen so far, I think this is a system that CP is gonna make work really well, both for those interested in getting it, as well as it not having a huge impact on those who won't.