It's unlikely that AudioWorklet will fix a video call issue (zoom is alone in using it, because it doesn't use regular WebRTC facilities), but we're aware of performance issues, and they are being addressed.

In particular the graphics layer is being rewritten (the WebRender project), and exciting new developments are coming these days (in particular usage of the OS compositor to composite some bits of the page, that saves lots of watts).

This is particularly important for video calls, because often you're playing back multiple videos at once, so any inefficiency when compositing video is made worse.

Other things that are coming is to implement new ways to signal temporal or spatial scalability (telling other peers that videos flowing should be lower/higher fps, lower/higher resolution), this will also help.