I love the forget out of Guitar Hero, while it was getting old there's still stuffloads of potential for it.
If they decided to release a program to officially support people creating and importing custom songs and notesets (this can be done via Homebrew but it's apparently a bitch) I'd pay for it.
There's an article about it
here.
Something that I noticed when I bought Warriors of Rock for 360 is also the controller is... well, a piece of stuff. The build quality is solid enough but by god it's a horrible thing to use. No touch strip, the trigger is loud as hell (it's audible over my stereo when my stereo is up loud enough for me to be legally arrested as I live in a block of apartments), the neck is a horrid shape and cramps my hand, and the whole thing is a terrible length and shape - if I'm standing up, I can have it down low in which case my right arm will be overstretched and mess up my shoulder, or higher up where my left elbow will cramp (as well as the hand). If I'm sitting down the strum bar will always be too far to one side of my body. It's just terrible in every way and unfortunately I don't have any previous controllers for 360.[/rant]
Still, as I said there's still potential in it if they'll relinquish just that little bit of commercial control. I don't see why so many publishers are against community content creation. Hell, they could set up a community DLC store where the people who upload songs get a cut of the profits from its sales, and then bam - new content keeps people happy, content creation means people can make a bit of money from it and you're making a bit off people who make more content. Everybody wins, right?