First of all: I love pistols. I love their style as well as their feeling.
But sadly, pistols outright suck. I think we can all agree that pistols on thief are one of the weakest weapon choices. Right now there are two ways you can use pistols. That’s P/D or X/P. You can try P/P – and when geared and traited correctly you can almost achieve a state where you are somewhat useful – but there are way better choices.
So what’s wrong with the pistol?
To determine what’s wrong, we first need to know what’s right, or what is considered balanced. A weaponset is only balanced when it is viable by itself, without the use of traits or utility skills. D/D for example is considered balanced. It has good damage, movement, some AoE (dancing dagger, death blossom) and control. Shortbow is also balanced, if not already on the verge to being OP. AoE damage everywhere. Good condition and burst damage, can also deal huge single target damage with cluster bomb and loads of movement. These weaponsets are viable without any traits or utility skills. They are only enhanced by them.
And then there is the pistol set. The only two decent skills that this set provides are Headshot and Black Powder, while the latter is rather situational. The set has low base damage, low condition damage (compared to death blossom or the sb, let alone other classes), no movement, no real defensive abilities and no AoE. In fact pistols on thief are the only weaponset ingame that does not have a single AoE damage skill. Not one. And it does not make up for it in higher damage.
Why does P/D work then?
P/D only works because it is being enhanced by the daggers skills. The constant stealth provided by CnD allows for constant use of the Sneak Attack, which in turn provides decent condition damage. In addition the perma stealth playstyle allows for great survivability. But again, this is only possible because of the dagger, not because of the pistol.
Why does X/P work?
It’s simple: the main focus here lies on the X and not on the pistol. The pistol is only a support aspect. It is a means to unlock the #3 skill and to get a little bit of extra control.
So what can be done?
Well, the pistols need to be viable on their own. They either need to have some AoE skills (or be able to become AoE, the 20% bounce chance from Ricochet right now is a joke), or they need a serious increase in damage to make up for lacking AoE and utility.
Frankly I would love to have a viable ranged alternative to the shortbow. Sure you can go for a P/P initiative regen build that relies on constantly spamming unload. But that is neither fun nor very useful. You give up all utility, all initiative and probably the second weaponset so you can spam unload to keep up a decent amount of damage, which comes by default when using other weaponsets. And P/D is not a ranged alternative, it’s an entire playstyle requiring you to go for condition damage. So it cannot be used as an alternative to shortbow.
On a side note: The lack of proper alternatives for the shortbow is probably also one of the reasons why people repeatedly keep asking for the rifle to become a thief weapon.