As the title suggests, I'd love to be able to remove a single materia from an item rather than having to remove all of them. Having this feature would be great, even if you could only remove the last materia applied. It would also be fine if this last applied piece were destroyed.
There's been several times where I had a piece of gear with every piece of materia applied perfectly, except one that I had second thoughts about later.
Thanks for considering this!