I am in the same boat... love my K-1, but would like the promised better AF, and the possibility of getting more FW updates in the future as the K-1 falls off the update list.
As to an update to specifically choose where NR kicks in and out of RAW, that would be most helpful to allay a lot of peoples angst.
BUT... I'd like to mention something else which I feel is a little bit of a 900lb silent gorilla in the room:
When I first got my K-1, coming from a K-5 classic, I was surprised a little by the amount of noise at base iso and 100% viewing compared to the K-5, and I find myself applying NR in post to RAW in ACR to files as early as iso600 or so. This takes time, and effort... if the built in NR just mildly puts back what I was used to with the K-5 as to noise, and doesn't smear it any worse than I would do with ACR in PP, then is there really a problem??? I realize there is the whole viewing size / number of pixels equation, I get that, don't please start with the math. I totally get that too.
Why worry about noise at 100%? Who cares what files look like at 100% ? Well what about 80% or 60% which is more likely to be a common crop? Well, if you want to get a sharp shot with a steady hold on your lens wide open for that creamy bokeh without a lot of noise ruining the shot on a shorter brighter lens, and / or your lens minimum focus distance doesn't let you fill the screen with your subject, or you don't have time to change to your long lens, or you didn't bring your long lens, you didn't bring your macro, or your subject is moving and you are trying to keep in inside the AF points border, or... or... or... lets suffice it to say there are a whole lot of reasons you might be doing heavy cropping.
Finally... my last thought that nags at me... The percentage of missed focus pics is going to ruin a whole lot more shots and be a whole lot more noticeable than any baked in mild NR applied!!!!
I guess I am trying to talk myself back into doing the upgrade, and that is my current rational. Still kinda on the fence, but I hate the idea of being left out in the cold on future FW updates... plus, part of me wonders if there will be even more AF tweaks in future FW updates, made possible by the new board, that my old K-1 won't be able to use.
Eric