[quote name='Mr. Anderson']After playing the demo all night, I'm starting to get a little worried. The reason GH was so awesome is because I started at medium and worked my way up to expert. It took a few months, but I got a great sense of accomplishment. I'm hoping GHII isn't too easy, as I can pass pretty much anything on expert without much effort. 55 songs is a lot, but will it be enough?[/quote]
The thing is, these songs aren't in sets that increase by difficulty like the Career mode in GH, so taking these four as an example of how the final 50 will be is just jumping the gun. If
this is to be believed, those are the earlier/easier songs that the game has to offer, though that list just misses several songs like Freebird and YYZ.
As for you being able to beat them easily on expert, screw you.

I can't even get past them on hard, though it's not like I could get past the first set on the original either. Damn that orange button and the fast reflexes needed to beat them. Damn them to hell. It's too bad that they couldn't get the E3 demo, which had Primus, KISS, Sabbath, Van Halen, Drist, Rush, and a few others along with co-op. More is better, but something is better than nothing at all.