Same thing happened to me when upgrading our tickets to season passes. But the good thing is once you finally got up to the guest services booth, they were nice and gave me their full attention and I didn't feel pressured to hurry. I think the reason for the long lines is that a lot of people are changing their paper fastpasses for the card ones.
But overall, I totally agree with your customer service argument. Universal has a long way to go on that front. For every nice person (guest service booth) I found, there were 3 other unfriendly people (boat driver girl, Cabana Bay cafeteria lady, everyone at Starbucks). At Disney, I had an elderly worker come up to me on his own and ask me if I needed help, just because I was looking at a park map. Little things like that go a long way, and its something that Universal definitely needs to work on.
That being said, just so I don't get accused of being a Disney pixie duster, there was one particular lady in the cafeteria of Cabana Bay who was so super nice. I wish I could remember her name. I just remember her being so sweet and british. It totally made up for how the rest of the staff there was treating me. Maybe british people are just nicer or something? (I'm not british, so I don't know).