Perhaps it would be a good feature to introduce a third tab and drop down list - with a list of pre-installed Luts (maybe user-ones too).
Sometimes when editing my scans, I notice that I am almost there, but there is something missing like a punchy contrast, or even less, or a certain color grading on top to get better blues-yellows-reds or what so ever, sometimes a saturation limit so colors don´t over saturate. Even with reediting and fiddling with all sliders in NLP or afterwards with LR ( wich gives harsh results) it is impossible to get there where I want my files to be. Only by exporting a tiff and editing this file again it is possible. But disc space and double content - you know So I created a bunch of Luts myself in PS and integrated them in LR. So maybe a selection of useful Luts for different scenarios (contrast, colors, grading) would be an idea? LR is using this already, even with an intensity slider - maybe a good point for integration ( so won´t work with LR6)
I will add a simple punch color/contrast LUT.
Just in case - to integrate this: Export your edited foto to PS via smart layer. Open ACR. Set everything to zero/initial scan except the NLP profile.
Go to the tab where your styles are stored. Alt-click on the little icon next to the trash bin - down right. In the next dialog uncheck everything and load the LUT (Color mode will be ProFoto). Save. Next time you will open LR, you will be able to use it as a new profile.
Do your NLP conversion as normal. Afterward set your new Profile and if you like change some settings again with the NLP dialog.