Title is pretty straight forward.

Examples. Have a piece of gear, say a body piece that would specify something along the lines of "Attack Magic Damage +7%" or "Weapon Skill Damage +7%" as an example.

You could even go as far as having a piece of gear say something like "Intelligence +2%." Either way I think it creates a lot of options.

The whole reason seems kind of obvious. Having "Attack Magic Potency +7" doesn't drastically increase damage on attack magic spells. However, if it were to say "Attack Magic Damage +7%," then we could actually see that 7% boost. This would work toward the efforts of people complaining that gear does nothing.

So, you couldn't say gear does nothing anymore! You can say it does a percentage more, and the numbers be justified.