Thanks guys! I will still be updating the list, but with regards to the huge change that was announced recently:
Since Bronze to Cobalt will be streamlined, and all of the Bronze cards can be seen in the game UI, there will be no more point in collecting these. I will update the list as a reference when the time comes.
For Lead and Iron, it was only said that more choices would be added, so we don’t know yet whether this means a full set of 9 loadouts (assuming there is a unique Cobalt, which according to @Djiesse seems to be the case). So I will continue to collect those until this has been cleared up. Should there be a full set of 9 loadouts, I will simplify the list to one tier, because all the cards can be deducted easily and the only unknown detail would be the card name.
For now I will start by removing all the duplicates from the tiers, so the list becomes much smaller already. I am also thinking about removing the card names, since they are irrelevant compared to their ID (they are not even unique for each merc). This would allow even further simplification by removing duplicates from the Lead and Iron tier. Let me know what you think about that!
It looks like we are approaching the end of this quest, and I want to thank everybody again who has contributed to it. I think it was great fun, a valuable resource, and potentially contributed to the community feedback which now lead SD to change the system for the (even) better. 
Also @Sniff, FYI you got the Cobalt exclusive A23 Fletcher loadout. Enjoy the super rarity unless SD makes it ubiquitous in the next update! 