I do that already...look at the 1st Gen bushcraft knife compared to the latest one. Same general idea, totally different detailing. Also, the EDC was passed around and many prototypes made and much feedback requested & received.
It's a great idea - just has to be timed right and I have to keep the "big picture" in mind. IOW, I can only make improvements that I can actually tool in myself here in my shop. And I would need to make sure the improvements meet a majority opinion. Some very satisfied customers never say anything about their knives. So, would the changes represent an improvement that all would want? Or would it satisfy a small minority of very particular customers? In the case of the latter, a small specialized run would be better (and I do plan on doing more of these....already have a few 'in the works').
Like I've said on many ocassions....suggestions are welcome here AND are actually listened to!
Dan