I listened to the "Midnight" and "Ramble on" and both are very cool.

Midnight was a little quiet however, as I don’t know the original, it is difficult for me to know what you were shooting for. I do know the Zepp song and it was awesome!

In both instances you could hear the piece you had tabbed out and that, as far as I can see, is the object of the exercise!!!!

Improvements would be hard. All I can think of is adding backing (bass drums, midi instruments etc). Even then, I don’t know that it would add that much (if anything) and may even act as a distraction, focusing attention away from the guitar piece!