Our Lead Designer for the game, Damion Schubert, has this to say:
Unfortunately, there is, in fact, a great disparity between these two costs. We want to apologize for this, as there was a miscommunication internally on how valuable these upgrades were, how challenging they should be to earn, and how fast a player should be able to earn them.
We truly hope you enjoy the challenge of the new Heroic Space Missions and apologize again for what we hope is a small distraction.
I want to reiterate that we are actively looking at solutions and they will be communicated to you as soon as we have a solid plan.
Are there any updates on this yet? I like the new missions, but Thanium Disruption is a bit too hard with grade 6 components, and apparently it's needed for two of the three weekly missions that are actually working right now. I don't want to spend credits and commendations on the grade 7 parts until you announce what, if anything, is going to happen to their prices though.