Cut off point for me will be when the players we have been reportedly after, namely Witsel, Mata, Koulibaly, Carvalhoetcc either commit fully to there current clubs or more worryingly move to another club, that will clearly show that either we haven't been offering the types of deals, fees and wages that has been speculated upon in many places, or that we are unable to sell the 'project' to top international class players.
Up until those things start to happen then yeah will be rising concern (christ after more than 20 years of doing nowt that will take a huge amount of shifting from our collective psyche) vut not gonna go all panic mode