Thanks for the link, very useful, I will certainly give it a try!
I see in the documentation that it is also using the same greenwork plugin, which currently support NWjs up to 33.3 and electron up to 4.0 beta 7, which is also not the latest version available, you still depend on greenheart updates, which comes about twice a year.
I'm working with NWjs 33.3 with the latest greenwork plugin and I have no issues with steam overlay, achievements or window capture in OBS, though game capture doesn't work.
But i'm more intrigued by your statement "I've got better performances according to my tests" this enough is a good reason to switch.
Did you test it on linux as well?