3 is what I would like most, with the extract destruction chance still applying anytime you're removing the materia to actually put it on another gear piece.

My ideal, however, is for a complete rework of Skill Speed and Spell Speed because the amount of finagling to hit a comfortable gcd per class is absurd. I'd far prefer, for example, a toggle per gear set to transmute x of some other substat into Speed, with no gear having it naturally. Most jobs within a role have different preferences for the ideal amount of sks or sps; playing PLD with DRK melds can be icky.