It's seeming pretty likely that I will advance to the finals (I have a 47.6 to 5.3 lead after playing CIN D, Dalton, and AJ Green vs. his Maclin. And have great match-ups with AP and Martin).

Is MJD is worth rostering at this point? I would pickup Bernard Pierce in his place.
I don't think I'd play him next week. Most likely in my flex, I'd play (in order): Wilson, Britt, McCoy, then MJD. Unfortunately, I can't drop McCoy because of the Thursday game.

Or is there a defense (for Week 16) that would be a better play than the Jets vs. SD?
Chargers vs. Jets
Cardinals vs. Chi

And in that case I'd drop MJD and the Jets D for Pierce and the Week 16 D.

Thanks.

Not really sure why you need Pierce given you just said you wouldn't play him.

Chargers DEF would be a nice pickup but I think you should hang in there. I just don't see a huge upside in making this early call...just let the week play out and figure out what to do afterwards.