The crafting inspiration system is intentionally designed to require a lot of Inspiration to level up the different craft skills. There aren't great ways to get this Inspiration aside from deconstructing hundreds of pieces of gear per skill.
As such, Intricate-traited gear makes up ~10% of Guild Store transaction volume. This contributes a lot to database strain, and that bogs down search performance for everyone. It also makes it more difficult to manage add-on data.
One thing that could help would just to give Intricates the envelope treatment and make them stackable.
I came up with something a bit more interesting though. To start, all Intricates would Bind on Pickup. Players would therefore be expected to vend or deconstruct all Intricates they generate, keeping all such transactions off the guild trader. However, in deconstructing an Intricate item, it would grant a 1/X chance to generate a Tips on [Crafting Skill] consumable item that grants X times as much Inspiration. For example, deconstructing an Intricate sword would give a 1/50 chance of generating a "Tips on Blacksmithing" consumable that when consumed would grant 50x the Inspiration as the Intricate item. This would effectively double the total potential Inspiration in the game, with a full measure going to the player that received the Intricate drops (encouraging them to potentially level alts), and a full measure that would be neatly consolidated into tradable stacks that could be sold to other players. This would be a friendly approach in "sharing knowledge gleaned from my experience." Or players could just use their own Tips to double down.
This might be best coupled with adding more levels to the current craft skill caps with more perks since leveling might become a little too easy this way. It would be quite generous in giving out so much more Inspiration, but I think the improved functionality of the Guild Store would be worth it.
If the 30-to-14 day listing change didn't work out so well, there probably are a lot of other ways like this to address the database concerns.