Jesus, tgchan, you've written a veritable mile long essay I stopped reading after page one!
You're getting it all wrong; GT isn't about what songs are or aren't available. The point of all these tutorials, and I literally mean the entire library, is to give us learners the tools to understand and play music independently.
Being a constant member for 12.5 years, I feel I have to advocate on behalf of GT. The instructors have done a stellar job in achieving this goal. I've perused all the other websites out there. This really is the best place to learn guitar. I think you should review your progress and appreciate how far you've come. Without GT, where would you be? Where would any of us be?
To be continued....
Am I the only one who plays multiple instruments? Let's be inspirational and find our muses everyday!