Some features from the CPP have already been incorporated into Layo a few updates ago. The cooler things for nwn(c)x are Windows-only, and as far as I know are not likely to be ported. All the Linux devs I've seen that might have worked on that object to not being able to release as open source. It doesn't hurt anything to download it for yourself, though. I think I'm currently running the beta.
Edit - if you were asking if any fixes were worth players
downloading to play on Layo, I'm not sure there's much point
just a few GUI changes (eg colorized icons, if one didn't already use them), because the server is on 1.69