Did the Valar make a huge mistake?

[obloquy]

The Valar themselves had forsaken ME...

No they hadn't. But continue, please....

...and it had many wounds which were the devise of Melkor. If the Quendi had stayed in ME they could have made ME a more beautiful place.

The Elves could not have wholly repaired Middle-earth -- it was doomed to be marred in the Music of the Ainur, when Melkor's theme arose in discord. Still, many of the Quendi did stay in Middle-earth. Why didn't those Elves fix what Melkor had done?

The back point is that the Elves would have not learned from the Valar...

You're drastically underestimating this little point. The noblest, mightiest, wisest, most skilled, and most beautiful of the Elves were all of the Calaquendi, excluding Thingol's offspring. This is no coincidence.

...but they would have grown as a race, as those of the Teleri that stayed.

"Grown as a race"? What does that mean?

There would have been no Rebellion of the Noldor and the Majority of Men would have been treated better in the world.

The Rebellion of the Noldor was not because the Elves were invited to Aman. They were free to leave any time they wished. The Rebellion was a result of Melkor's cunning deception and divisiveness. I think Men got the treatment they deserved, pretty much. The ones who earned it were respected, and the rest of them were held in suspicion. How, out of curiosity, would it have bettered the situation for Men if the rest of the Quendi had remained in Middle-earth?

[ August 01, 2002: Message edited by: obloquy ]