This is my head canon:
- Game designer creates game design document specifying that these modules cannot be engineered.
- Everyone on the team seems to have missed that. UI and backend teams didn't enforce this limit anywhere.
- Game designer never actually tests any of these features so didn't notice either.
- Past CGs finish and everyone engineers their module rewards. No one notices.
- New developer writes code for the recent CG, notices the constraint in the game design document, and implements the restrictions on the backend only.
- Players start seeing backend errors when trying to engineer the new CG reward.
- Game designer: "You've never been able to engineer CG rewards"
- Sally: "They're saying they have, all of them"
- Game designer: looks at dev team
- Dev team:

You're not cynical
enough, I'm afraid. I've worked in the industry myself, on Ultima Online as an EM, which is a combination of content provider and public communications... Design document? A-hah-hah-ha, bless you. If one existed, it was long ago lost, or taken home by who ever was working on the code back in the day. And the current programmers certainly didn't tell you what they were up too; you built what you could with the tools that you were given, and didn't ask because often the overworked programmers (who often don't have many human facing skills in the first place) were furious with you for crossing what they saw as territorial boundaries. I once got a dressing down for just asking what the timing on the delay for NPC broadcasts was, because we couldn't use NPC to NPC responses as they had bricked the server once... but I wondered if staggered NPCs could simulate a conversation...? But how dare I ask about programming secrets?!
And if something later exploded in your face, either because you found something unrecorded in the tools, or the management or programmers hadn't thought through the consequences of what they'd engineered, you then got stuck waiting for Official Response to be handed down to give to your players as they retroactively tried to clear up the mess they weren't even aware would be there.
In this case, the fact one class of drives cannot be Experimentaled, whilst all the others can and the UI is failing to warn you indicates to me that there's a software cludge gone in that is treating these drives as something slightly different
in the code itself. The Server Error is because the game itself isn't structured to respond to what is now in game, it doesn't know what the drive is when it tries to apply the actual data change. And FDev as a whole probably didn't even know the cludge was there, let alone why it was done that way this time; Working on the art, working community like Sally is here? Not their business I expect, and they'd be told to keep it that way.
But that doesn't mean that Management or Programming didn't think these drives should be different; they may simply have forgotten they ever said all the other rewards
could be Experimentaled. We had that all the time at UO, management thinks one way this week, a different next; I once got bollocked for doing player roleplay supported events,
when it was in my written contract that I was expected to do them. My guess then is someone high up said "Here's an idea for a reward, and it can't be Experimentalled", someone cludged in code to allow this new type of object, and no one knew any more that the code to correctly address it elsewhere had never been implimented. Hence the meetings Sally is referring too, now the whole company has to get behind a single position in order to ride out the obvious display of internal dysfunction. I suspect again from experience that the reason we're hearing now that the drives will still not be allowed to be modified is that it's someone very high up or essential who wanted it that way, and so you can't possibly say "This idea was stupid".
At least, not right now; if the public disquiet continues, look for when the feathers are not so ruffled behind the scenes for these drives to be brought in line with all the others, and it repositioned as "Listening to YOU, our beloved customers! We're a listening, loving set of people!"
The gaming industry, especially in dysfunctional companies, is a load of old bobbins.