FFXIV's materia system hasn't been designed like the FFVII system though - it's specifically a way to eliminate old gear from the game without selling it (hence the spiritbonding process to make it), as well as (at least the idea is) to allow players to customize their equipment with new stats - it was never meant to be a FFVII style system where you could find materia anywhere and equip and remove it from gear at will.

Sadly your ideas are really just too overpowered and would easily abused by players, hence why SE went this path.

Also there is no PM system on this forum, so 'PMing you for feedback' isn't an option.