Have you considered the possibility that he was very well aware that quality veteran outside WRs on bad teams were going to be available before the trade deadline this year and made a conscientious decision that adding one of them was smarter than spending limited FA money on a lesser talent in the offseason?
I think that he's a good enough GM that he has his finger on the pulse of the league and the efficient manner in which they've successfully dealt with the WR issue this year is evidence of that.