I have to weigh in on this a bit. I've been carrying a HAK (Hideway Knife) for years now and have trained with it extensively. It's an extreme variant of the finger hole concept to the point it has no handle instead having a two-finger capsule. It's the ultimate end result for anyone who wants a 'small' knife such as being described. It has notable limitations, namely the fact it cannot be drawn as easily as a La Griffe or Swick. I turned down the Swick 2 sprint due to the blade length and shape (I highly prefer Wharnecliffes, just a preference, not a dogma) , and dislike the La Griffe's production models because of the chisel grind and hawkbill. For a knife such as this which is meant to be carried constantly and used in extreme close-quarters, I am fine with a small blade such as the HAK's sub 2 inches. If the Swick had a smaller blade, I'd be fine with it even if it were for utility purposes.
I also have to comment on the handle debate. I have the smallest hands I've ever seen on a male, many of the women in my life have larger hands than me. I've found over the years that knives that others complain about fit me absolutely superbly, but often find that many traditional designs simply can't be reasonably handled. In my hands, a Delica seems truly full-sized, and even after years of training an Endura is tricky to draw and open because of my hand size. There are a lot of popular knives that simply aren't reasonable for me to hold and use. As some one with the appropriately sized hands for a female, I would honestly have interest in an ever so slightly downsized Swick which kept a focus on the finger hole. I wouldn't just recommend it to females, I'd carry one myself daily as a true evolution of what Fred Perrin was shooting for. A two inch blade or a shade under would be fine for me, and looking at the handle design I personally prefer the original Swick for its more skeletal handle. Was there handle flex that had to be alleviated in the later model with the added material?
Other companies have taken the Perrin concept and focused on giving the most blade possible...At some point it gets to be too much for the handle, the finger hole is ideal for controlling a small blade with security and precision. A larger blade adds more leverage to work with, negative blade angles don't quite work well for me when they're trying to match a full-sized knife blade. While the hole means you can't drop the knife no matter what size it is, I feel it works best with smaller blades in which you essentially grow a claw you have distinct feel and control over.
Realistically, most consumers will have larger hands, and will desire any blade length they can manage. I won't pretend a smaller Swick would sell, I'm used to having hands too small for everything. I'm glad to see the Swick is still going and changing, will definitely give it a look. I eventually do need a finger hole knife, I must say after a lot of looking around that Spyderco is putting more thought into the concept than others.