Dress Material and Mariner Cotton Cloth drop rates are awful.

[Raven2014]

Heck I even suggested in my OP that they wouldn't even need to increase their individual % but to remove things that I doubt many would miss or even realize that some things like the pink gear were still in the game.

How can you remove thing "without" increasing individual %? I don't ... think you understand how probability work. If you remove items from the loot list, you increase the % of the remaining loot, math is not a vacuum.

And frankly, map's mat is one of the "VERY FEW" things remaining for casual player to earn some gil. I personally don't do it, but I would not want to take it away from them. Gathering mats, materias were used to be other means, but more and more SE made them falling from the sky. Outside of housing this game is already as accessible as it it in term of getting what you want.