NLP applies (amongst other things that I don’t know of) a profile that depends on the camera used, a scanner emulation (if selected) and some magic that changes the R, G and B tone curves in order to invert the negative.
The second step allows to influence colours in the direction of what you select with the “film” button and all the other options but offers no way to make your images look like “Portra”.
Sharpness and noise…hmm…are more of subjective/matter of taste things for me, at least within (un)certain limits. Impressionist paintings don’t look sharp, although each brush stroke is precisely and intentionally put. And although each pixel is sharp in itself, the complete image can look blurry. Does it matter? Is sharp image of a boring thing better because it is sharp? Be your own judge.