Before the transfer window opened Poch openly stated he wanted to sign players, and get the deals done before pre-season. As the window progressed, right up until the end, he continued to say he wanted and expected to sign players.Why do you ignore the possibility that Poch didn't sign a single player because it was his decision not to? There is plenty of evidence to support this, even from Poch's own lips too.
Remember when he was put in front of the cameras on the US tour and asked to explain our lack of activity. He cut a frustrated figure as he told the reporters they'd have to ask Daniel.
Of course, if he was offered players he did not want or thought they offered no improvement it was his decision not to sign them. But do you honestly think he wanted to go into a whole new season without any improvement? Of course not.
The evidence, as you put it , is that he desperately wanted new signings, but was not offered a transfer budget that allowed him to get the calibre of players he was looking for.