Vanek isn't a mediocre vet. I don't know where this is coming from.
Mediocre: of moderate or low quality, value, ability, or performance; ordinary or so-so
Over the last 4 years, Vanek averaged 49 points, had a negative plus/minus every year, yielded increasingly poor trade returns, and turns 35 in January.
That's extremely ordinary to me.
I'm not saying he's going to fall apart and be the target of a buy-out. I'm saying that going forward, he's a fairly pedestrian player, which he is.
And more importantly, that he's one of many pedestrian players on the roster. Detroit could cull a few more and still have a veteran presence, as opposed to adding more.