is this a serious survival knife , or just a gimmick?
As Codger stated, posing this questions will bring out a vast variety of different answers. Mostly what I've seen, It's a love it or hate it deal.
The 'gimmicky' aspect, and opposite functional aspect, of the TB Tracker ( and any other WSK design) is in the eye of the beholder. There are different strokes for different folks. I think what gets overlooked a lot in this forum is that we don't gravitate so much towards what we need, but what we want. We exist in a time with a vast array of choices. 100 years ago, there were no SAKs, WSKs, Bic lighters, mag blocks, Camelbaks, decent backpacks, etc. now, we can pick and choose from a multitude of different tools to take into the woods.. Or not. It all depends on what type of experience the end user wants. Me, I like to have fun. Sometimes I like to work hard to have fun, other times I like to go easy.
I have a RED Scorpion Six Predator WSK, and I love it. I haven't had much opportunity to really use it much, but what using I did easily fulfilled my expectations of the knife. Sure, I could have easily used my little Mora knife to whittle tarp stakes, make notches, make fuzz sticks, and what have you. The saw on the Predator made speedy-clean work of notching, the draw knife made carving easy. Actually, I didn't use my Mora at all on the trip just to exercise the Predator. It worked great for me and what I was doing.
But that's me. I wasn't in a life-or-death survival situation. And honestly, I hope I never am. My RS6 Predator WSK did everything I expected of it, and I would imagine most owners of the TB Tracker would say the same thing. So for me, the WSK design is not gimmicky. I see it as a multitool, because it can do a variety of tasks. Again, that's my 2 cents, and I don't expect folks to jump on the bandwagon.
Edit: By the way Scott, I like what you did with your Tracker. I have been considering reprofililing the draw knife portion of my RS6 Predator, but I think I want to use it more before I make changes to it.