Dak had his worst game coming off the bye. It wasn't a coincidence, he even stated that waiting the extra week was difficult and threw him off. If you rest him in week 17 he's off for three weeks. I don't think that's good.
We can afford the really low risk of injury because we got Romo to lead us to a Super Bowl if necessary.
I might consider resting Zeke and at the very least playing Dak the first half.