Are you guys talking about engrams or Exotics that actually just roll for you as a reward after the strike? Because the random loot rolls that occur at the end of playlist strikes are the same for Roc and Tiger, and the lower level playlists for that matter (maybe not all of them, I have no idea). DLC non-owners didn't lose that. It's an absolutely tiny chance, each time, but available on both playlists. I haven't ever received one personally.
It's the guaranteed blue engram(s) that you don't get with Tiger, and that's the only difference (in fact, you do get the same marks and rep for Tiger and Roc, which kind of sucks in its own right for DLC owners, but whatever). The primary rewards and reward loot rolls are the same, but no guaranteed engrams which makes it tougher to get class-specific upgrade materials, or level up alts, if you don't own the DLC. And that totally blows, but that's the difference. nothing with regard to getting exotics outright as a random reward. I hope you don't keep just spreading this to people, because there are people who don't own the DLC but still play and they shouldn't be misinformed about that.