The main advantage that you knifemakers as independents have is that you don't really have to produce 'models' of knives. If a knife you are making should happen to be a hit then keep producing it. On the other hand, if the odd experiments aren't fully working out then set those projects aside.
Basically, as much as we admit it, we are a bit of a fickle group and our tastes change with the direction of the wind. Last year the Nessy's were hot as hell, then this year you did incredibly well with your Kepharts and the smaller versions of the kephy. I think you just have to stay flexible with the market trend.
Hollowdweller made a strong case for the year of the full tang scandi bushcrafter. That still seems to be a market with relatively few folks making. Couple your existing bushcrafter blade with a scandi grind and you probably couldn't keep them in stock. Imagine some of your smaller pocket knives with a scandi? Then all of a sudden, people will get tired of scandi's. But now you will have experience with all of the different grinds and be able to pump out what the market wants.
I don't know what the best marketting strategy is. That seems to be the difficult nut to crack. Everybody seems to have a different model. Bryan is mostly an order by e-mail guy. He never offer's one off blades in the for sale area. Koyote uses a mixture of the two, although I think he has shifted more towards orders. Andy doesn't even take orders, he creates market demand via lack of availablility and then offers a bunch up all at once.