As if the crafting grind wasn't bad enough :(

[Felis]

You do realize that a 10% chance mean that only 10 out of a total of 100 will succeed and not 1 in your first 10 will succeed.

Not exactly. It don't remember how many lost were there before.
It is more like rolling a 100 side dice every time and to hope to get 10 or less points for the win.

There really needs to be a mechanic through which you can improve your melding chances. Potions, food, FC actions, crafting action, etc. Maybe something you purchase with blue crafting scrips. I'd also like to see a mechanism that allows you to use more materia in a single meld to improve chances of success.

I don't have looked how it is in ARR, but during 1.0 HQ equip had a higher melding chance than NQ equip.