As far as i see this is not a request for a native export, rather a Scirra controlled wrapper.
So what are people asking for here, a native exporter or for us to take control of the third party wrappers? Those are very different cases. Well, for NW.js, I think Intel have 1-2 people working on it full time. I've heard in some cases it can take literally hours to build Chromium, which must make it a slow and frustrating development cycle. So it's nice that Intel are doing this for free! If they ever stopped, it's open source, so us or anybody else could pick it up, or there are other alternatives out there like Electron that we could look in to. Also the biggest problem NW.js had recently was the janky v-sync issue, and that was caused by a bug in Chromium itself, not NW.js. So whoever happens to be developing NW.js wouldn't have affected that.
android is still shitty with no webgl support
Chrome for Android has supported WebGL since late 2013. Android 5.0+ supports it in the system webview so you don't need Crosswalk. Crosswalk exists solely for Android 4.0-4.4 compatibility, once those versions are out of use then we can drop it and its filesize overhead as well. In fact you can already publish without the filesize overhead today by targeting Android 5.0+ only. However especially given that Google recently increased the APK size limit to 100mb, using Crosswalk is well worth it for the compatibility with 4.0-4.4.
The main problem with WebGL on Android is that Android devices often have poor quality drivers that are so susceptible to crashes that their GPU gets blacklisted. However the number of Chrome for Android phones that don't support WebGL halved between June 2014-June 2015. So it's already improving quickly.