Nasri and SIlva are the only AMs we have who have excellent close control and who are good in terms of intricate passing. Both are entering their 30's and aren't fit for a full season, with Nasri becoming more and more injuryprone. One of the reasons we are allowing teams more chances is because Sterling and KDB don't keep possession well enough. Games become too end to end. We used to camp on the edge of the opponents area away from home, we haven't been doing that much recently because we are without Nasri
Isco, one of the best players in europe in the above attributes, would be both a short term and long term signing. Some seem to be overlooking the latter.