Cup game or not, I don't think Edwards is really ready for top flight football at the moment. As you've said, a decent second half of the season with QPR will do him the world of good (as with Charles too).
I might have to go back on my words here a little about Woods, maybe it's more along the lines he's surprised me a fair bit as the feedback from Swansea fans wasn't exactly positive when it came to his all round game. He is another player who is still young and I think if he can improve on some of his play then he'll be a really good asset for us.
I can't see him even playing in that Forest game, he might get a run out against Swansea at the weekend but I think he'll be off soon enough and I don't blame him. Hopefully Bednarek takes the advice coming out of the Polish press and decides to move to France or Italy.