webview is fairly unreliable and broken on rockpool currently, thanks to newer qtwebkit etc. I change settings as needed by modifying the app.js etc on the phone's filesystem. Some stuff doesn't work at all, but luckily the watchfaces I'm using don't need them.

Also, re: pebble in general, you should check out rebbleOS. It is being actively developed, feel free to pop into the discussion on their discord server. It's coming along nicely, and seeks to replace that dead ecosystem fairly soon.

That said, I still use my original pebble steel daily with my xperia x, and I only have minor complaints. It doesn't have the vibrate bug on calls, and notifications seem to be reliable.