I also don't think that getting the likes of Sanchez and Khedira will significantly reduce the playing time of guys like Wilshere, Arteta, Flamini, Ox, Podolski etc. Fatigue and Injury ALWAYS set in, judging from previous seasons, we can expect 6 players to be out at a time. With more depth in quality we'll have just about enough players to effectively rotate while competing in all four competitions.