I've certainly had long, long stretches without getting at least a year one weapon from Crucible or Vanguard packages. It probably took 40-45 Vanguard packages before I got an LDR. I've had particularly poor luck with faction package rewards as well. I will consistently get the same piece of armor over and over with the same two stats rolled. Usually Disc/Strength Boots/Arms. I believe I went 34 packages with FWC in a row without a weapon while trying to get their TTK ship before it was officially announced to be bugged for many players.