Well to start things off I would like to say that I appreciate the work that the developers have put into this play test. I have thoroughly enjoyed examining and testing these classes, the gunslinger especially.
Now onto the main topic, the Gunslinger. When it comes to the Gunslinger I looked at it as more of the "Tequila", Hard Boiled, character than the sniper character. I took the approach that this character was in your face, barrels blazing and so far I haven't had a problem with it.
Now while I have noticed that the majority of people who have posted on this play test do not appear to like the idea of grit due to its incredibly small pool of points. While maybe its just the group and the DM that I play with but I have yet to actually run out of grit in games so far. But maybe my group is slightly more theatrical than the groups of other people.
In my opinion the mechanic of grit works the way it is. Maybe the description of grit is what may need to change. The play test states that grit is a measure of the Gunslingers ability to calm himself in the heat of battle, while the ways that you regain grit are anything but that. Perhaps the definition of what Grit is needs to change instead of the mechanic.
Now since I have mentioned regaining grit, in my honest opinion grit is not hard to regain when you look at grit as a measure of the Gunslingers brash bravado and gutsyness with in the middle of combat. A Daring Act, while up to the GM as to whether it counts or not, happens more often in combat than maybe a lot of you are considering.
The only thing that I personally see wrong with Grit is that maybe it should be the total sum of both your CHA and WIS modifiers instead of just your WIS modifier.
I myself would like see it be at first level you get 2(or 4)+Wis and 2 more points of grit per level like the barbarian rage/bardic performance
I haven't had a chance to see the class at work in an actual game yet. But I have tooled with various builds, both straight and multiclass, and I really do like the class so far.
The low Grit points thing does blow my mind, though. I can't help but wonder why they don't just do 3 points plus your Wisdom mod, like they do with most everything else.