Not about this specific issue, no, but they've mentioned it for others (namely inventory space, sometime within the last few live letters, as I recall--though it might have been an interview with Yoshi). If the concern applies to one concern about server communication, it would apply to others, though not perhaps to the same degree. I'm not making excuses for them so much as trying to suggest why they may not have done this already.
There are also likely technical limitations, as the game seems to reset buffs as a general rule whenever a character is disconnected from the server. Fixing that so that crafts could continue across a disconnect would mean rewriting something that's likely foundational in the code, and rewriting code is always tricky (if you ever played WoW, you might recall Paladins randomly having the ability to summon a black Kodo mount if they specc'd 3/5 in a certain talent that had nothing to do with mounts because of some other, completely unrelated, change).
Games like this are incredibly complicated batches of code and sometimes what seems like a simple solution from one perspective ends up being anything but simple in the long run. (As another example, FFXI essentially cannot go above level 99 because of fundamentals in the code that were set some 15 years ago limiting the value of character level to two digits--increasing the level cap would require a massive undertaking as a result.)
A more likely example solution is some sort of NPC that will hold/duplicate a set of mats for us for a fee for say 30 minutes. Make it have a gil cost or some other limit so it's used mainly for big synths. The NPC could hold the mats in reserve, perhaps establishing some sort of check (not unlike a quest) to see if we've actually made the item we set out to make. If the item is made, the NPC's back up items disappear. If not, up until that 30 minutes is up, we can reclaim the items if they're lost because of a disconnect. The check would also have to watch for failure, too, of course, to prevent abuse.