I didn't bother to read the comments so I'll just say it.
There's an actual help topic posted by Cozmo that lists all the shaders and emblems and ships that are unobtainable due to a glitch or a bug in the game.
I'm on my phone right now so I can't copy the link to it but it's not just the crucible and strike shaders that aren't dropping and it is a known issue.
English
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Not a bug. He just stated that ones like valsgarde, lion dancer etc. just aren't obtainable yet. Cicero, gilgamesh, achilles and whatever that other crap shader is are just sealed in y1 currently
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I recall that same post as well. Will post the link if I'm able to find it