Which Job you want next?

[Jandor]

I honestly still see the Garlean Gunblade Job more towards Lightning's play style thus it would fit into being the 2nd Job that shares gears with Ninja being a melee DEX based job.

Someone needs to share that heavy melee gear with Dragoon though.

Personally I don't tend to factor in main stat or gear, the primary stats and the maiming and scouting sets all seem to exist for primarily cosmetic reasons anyway.

less focus on being the Heavy hitter like Regula and more towards fast slash attacks with fast gunshots from the Gunblade in quick combos.

Gunbreaker follows more on Squall's play style which is being the more mid-speed slash attacks to build up for the Mid-speed explosive attacks due to the nature of the Gunbreaker's gunblade.

I think the heavy option is cooler, and I think the melees are more lacking for another heavy option than another fast one, but mostly I was going for maximum differentiation from Gunbreaker gunblades tbh.
The odds of getting a second gunblade class are already incredibly slim.