I have only commented twice before about this knife. I don't like it. Is logging a criticism trolling and hate? Hate is when you degrade people - not things. Is this the - tell me how great your knife is forum? Do you seek reassurance? Do you not trust the knife enough to stand it up to a little criticism? What is the qualitative difference between those who try to convince others how much they like a knife versus the opposite?
Check out the "Pivot screw on dragonfly 2 frn" thread. The knife has a problem. Mine had this problem. Where is the quality control? Why is Spyderco unwilling to offer any advice on how to get the pivot out and require I send it in at my expense for postage both ways - a brand new knife out of the box? Because it isn't designed to be taken apart. Remember, this is not a flow through design. People may want to clean and oil it occasionally. And who wants a knife that will void the warranty if you try to take it apart? I won't buy any knife that I can't clean once in a while with few exceptions.
The DF-2 is not my thing and I explained why. Jimping and scales are personal choice, but they can have better or worse applications. I think this is an example of overkill given the size and obvious limitations of a metal on plastic build structure. I'm not a fan of metal on plastic where stresses occur. For me plastic is for scales. That is a great application and FRN, especially as done by Spyderco, is under-appreciated as a handle metrial. If you're turned off by the plasticy feel of FRN you probably didn't buy this knife. But the real reason not to buy it, IMHO, is the metal on plastic, the pivot problem and the warranty.
When you look at the catalogue of knives why would anyone buy the DF-2? What is the overarching characteristic of this knife that separates it out of the pack? The weight. It is one of the lightest knives of its size available and it has the forward second choil for added ergonomics. If what you need is to shed a few grams, by all means get the DF-2. But there is a downside. I'm sure this knife is strong enough for many uses given its size. I can get a light knife with excellent ergonomics for my hand and with more strength for less if blade steel is not a top priority. But if those tiny weight reductions are that important to you I can see why you'd like it.