Disappointed in the quality of the 1.1 raw converter at high isos

Question

I've been using Lightroom since the first Windows beta, and the very first thing that jumped out at me was the wonderful way it handled digital noise at high isos. It seemed to convert it to a unique kind of grain -- I thought of it as digital grain.
I started shooting at ISO 1600 intentionally just to get that look. ISO 1600, jam the color noise reduction up to 100 percent, and leave the luminance slider at 0. Ah, heaven!
I upgraded to 1.1, and since I've been doing some high-key work at lower isos recently, I didn't notice a change. Then, a few weeks ago I was editing some old stuff, and I zoomed in, and thought "That's odd. It looks like there is some luminance smoothing going on." I checked the luminance slider, and it was still at 0.
I was absolutely positive I found a bug, so I googled, and that lead me here, where I read numerous threads on the subject. OK, I get it, the new de-mosiacing algorithms can reduce the level of noise for a certain level of perceived detail. I've checked it out, and in some of my images I can see what that means. I'd have to say I like the new look in 3 out of the 250 or so ISO 1600 images I've looked at so far. I tried just living with it -- maybe I was being too afraid of change, and maybe I would get used to it over time. Sadly, that wasn't the case.
The fact is, even if the overall level of noise has gone down since v. 1.0, the
type of noise changed, and it's something that I can clearly see in my larger prints. Do I see it in my smaller prints? Not really. But every time I zoom in to 100 percent on an image, I grate my teeth, and become just a little bit more resentful.
For me the whole point of Lightroom is that I'm able to process my images, come back in six months, and have them be exactly the same as they were before. If my older images start shifting around and changing themselves behind my back every time I upgrade, what's the point?
I butt my head against this every time I process stuff at high isos, and I get extremely frustrated when working with some of the 1.5k+ shots I intentionally shot at 1600 just to get the wonderful luminance noise look.
So I'm going to plead with the development team here:
please give me my old noise profile back! Don't make me downgrade my entire library to 1.0 and live with version 1.0 on Windows forever. Give me some hope!

Answer 1

I knew about this issue with the version 1.1 but, sincerely, I was quite happy with the new improved sharpen and noise reduction tools, and also with the clarity tools and all the improvements... until now.
I just have printed a more or less big print (20x25cm), I looked at the print and... "what's that?". My print seems a paint. It just seems this kind of pics you get after applying some "oil paint" filter in your favorite image editing software. HORRIBLE. I don't know if the print interpolation (I just added some resolution in the print module) also accentuated this effect.
Definitively I don't like this "look". It's too different from any other raw converter. It doesn't seems a photograph, digital or not. Version 1.0 had some issues, maybe it was too noisy and the sharpening wasn't good but you could use your favorite noise reduction sw or your editing sw and improve noise/sharpen. What can I do with this "paint"?.