Cyril Lucar was a brave and righteous Christian. Think how all Christianity would have been glorified if he had not been destroyed by the same powers that seek to nullify the Scriptures and slay the faithful.
Yes, he was and it seems that the Jesuits were hard at work to stop him.
What it does show is that (along with the Longer Catechism) that truth was being taught in both the East and West.