I might be confused at what you are saying here, but Favors was pretty solid this year. Not worth his contract, for sure, but he had a net rating of +2.6, and mostly played against starters.
Yeah...and look at the Net Rating with him on the bench. Favors didn't play against full bench units in his stints, but he also didn't play with full bench units on his team. He played with a lot of good players. We had a positive rating in spite of him, not because of him.
There's a million guys who can score efficiently around the basket these days. At the end of Favs first stint here, he was doing it at a high volume but that is no more. Defensively, he's horrible at the rim and doesn't cover space with his feet either. Quin's system compounded this issue, but Favors is nothing defensively around the basket. It was a layup line whenever he was on the court, especially during the playoffs.