How ballsy you feeling?
If the answer is not very, then roll with Tate. Even though he won't get that many points, at least he'll get some. Rolling with MJD is a bit of a risk right now because of the whole hold out thing, however, he has much greater upside, so if you are indeed feeling ballsy, roll with MJD.
I'd have to ask you the same question at WR. If you're not feeling very ballsy, go with Moore simply because chances are he'll get more balls thrown to him. However, I think Moss has better upside. I don't think Alex Smith is the type of QB to throw the ball deep too many times, however, so we have to keep that in mind.
Go with the safe choices, I suppose: Tate and Moore.
See how the season pans out later on with Moss though. He's worth holding on to in case Alex Smith decides to start throwing it down the field more.
Thank you for your help on mine, by the way!