Practically every Chelsea player is a risk at being dropped, even Maureen's lucky charms, Frank himself.
I too have stayed clear of Man United midfielders, and to be honest, since Ronaldo left, they don't have any stand outs anymore. No one that can guarantee you 10+ a season, and for midfielders, you want ones that scores the odd goal and Michu/Lampard/Walcott are what you want. These players get into the box and take a shot, in the case of Michu and Walcott, sometimes it is like you have a 4th Striker in your team. Getting a defensive midfielders is bad business IMO, going for that clean sheet from midfielder is no point, an attacking midfielder gets the clean sheet points regardless so you might as well get one that goes forward a bit more and get that goal compare to one that doesn't.
You are right about Spurs, I gone for Soldado up front, he will start every game, that is as certain as you can get in this game, same as Van Persie.