[Snake]

Well, could always make it so using Potential Skills cost 15% of your maximum FP, or as I suggested, double the costs, if you don't have it equipped. But seeing that some potentials already add their own skills with no repercussions, such as Swordsmith's Rain from Grandovyn, that's pretty much the idea I had to make all potentials equal in, well, potential.

If some potential skills are in and not belonging to any class, why can't we have class-belonging ones enabled for weapons that shoehorn you into playing specific set ups?

This might increase a bit the variety of people doing more unique things, which is what the game kind of lacks right now. (Hi Bonder Meta!)

The goal behind this is less balance, and more to allow variety and creativity freedom to follow certain themes. A weapon's potential shouldn't be so harsh on limiting you over where it should be used, class wise. Or else it promotes homogeneity of themes, which is what we really, really find abhorrent in the game; (Hi Bonder Meta! pt.2)

Some creativity freedom is in high demand.

Besides, it's just one skill. Not the whole class. It's not like giving someone Eclair Lacroix is also giving them Flottement, Fleur, Sidecut, Sharpen, Disengage and literally everything else that makes Duelist, well, Duelist.