I believe that there's an inherent problem when it comes to gear with trait-type bonuses on them.

Maybe not initially, but eventually you're going to run into the situation where the passive bonus provided by a piece of equipment turns out to be so good that no other option for gear in that slot will ever become viable until something even better comes around that replaces it.

The way gear is setup right now, you're not ever really going to have that problem, because even if there's not a whole lot of options, you still have some choice and room for personal preference. People will debate the benefits of +20 Crit. vs +20 DET, and both sides could be right, depending on the kind of build you're going for.

However, if one piece of gear gives +20 Crit. and the other provides a 20% boost to Full Thrust damage, you're always going to be wrong if you choose anything other than the 20% Full Thrust boost, which will forever be useful.

There's no choice anymore, you either have it, or you're bad. And that's not right.

I do think it would be cool to see set stat bonuses on some gear sets like SE currently does with the grand company gear.