Why does the Javascript Editor not support content assistance like Eclipse WTP or jsEclipse?
Nice to see what the BOM of browsers support, but I do not get any assistance for elements defined in my current script file or that of any external one.

Any plans to support this?

Yes plans to support this are comming very soon, we are sorry for the trouble.

Just to clarify, you mean you see basic JS autocomplete support, but not for custom functions/vars and such right?

I'm sorry to say that, but the support is very basic. And to answer your question:
YES, I do see basic support.

As you stated, nothing :? to support my daily work like custom functions in the current file or any framework is currently included.

I hope those features will come very soon for I used jsEclipse prior to MyEclipse. But your Javascript debugger is a feature I won't miss any longer.