Well, I don't like vnzla's trade idea, but it wasn't "Granger for Redick"
His trade appears to be centered around a couple assumptions:
1. Pacers probably won't re-sign Danny
2. Green is probably nearly impossible to trade
Therefore, what he proposed was really dumping Green, getting your 2 guard to play with PG, and improving the backup 4 spot.
Again, I don't like it. But, it isn't ridiculous.
Here's vnzla's original post: