Customization... There's a theory the blessing ones have hidden buffs to them. Actually came across this thread looking for reports on ppl's experience with them. Blessing of the Unmade is what I've had for the past 3 weeks... Rarities I've came across a lot more than my buds are rare ship plans in chests (11 found total, 3 duplicate) and 4 exotic weapon bounties from the bounty vendor (one duplicate for bad juju). Could be entirely random coincidence, "unmade" fits both of those however... ships are plans and exotic bounties are strung out tasks to get the weapons built... Take it for what its worth : )