Reus is a wing forward, like Theo but without the whole "running down blind alleys" trick.
Irrelevant. We have 4 midfield positions up for grabs really. One midfielder will always be Flamini or Arteta. The striker will always be Giroud.
Those four remaining midfield positions can be played by any of Ramsey, Wilshere, Ozil, Cazorla, Walcott, Rosicky, Podolski and Oxlade-Chamberlain (not to mention the one of Arteta or Flamini that didn't fill the DM slot). It's pretty certain that AW doesn't care if you're a wide player or a central player... any four from those eight (or nine if you include Arteta/Flamini) can play together. I think eight (nine) players vying for four positions is enough competition. Unless we sell one of them. I suppose if we got Reus that would be pretty much game over for Rosicky.