ES6 features are faster when natively supported and natively optimized like in JSC.
Speed is great and all, really great for some people. I just wish they had different priorities.
But webrtc support is cool.
My room, on the other hand, is definitely not tidy. Haven't cleaned that shit in ages.
But seriously, we have a bunch of developers asking for JavaScript improvements. Maybe OP doesn't want them, fine that's useful feedback... but it would be more easily received if it came in a nicer package :)