I fully agree that right now reconstructing jewelry is too expensive right now that there will be only niche uses like creating a second ring.
Nobody except Sheogorath would consider destructing and reconstructing jewelry to be an option right now.
Thats not entirely true. Reconstruction always creates an item in the lowest quality it can drop in without requiring upgrade materials. Which means if you have hoarded blue dungeon jewelry, or purple perfected jewelry you can just decon it and recreate it later with only costing transmute crystals.
Besides that gear changes are usually are every 3 months or in even bigger time frames. Do you realy want to tell me ppl are unable to gather the materials for a jewelry gold upgrad ein 3+ months?
Actually I have upgrade a single item to gold yet and have chrome platings for one more item and I am close to the third. And I did a lot of crafting writs so far. This took way longer than 3 month.