I tried Eclipse many times over last decade. Always used for few weeks before code highlighting and completion drove me insane due to multiple crashes, hangups and slowdowns.

Trouble with elaborate 'correct' solutions starts when you need another thing. I don't think support in Eclipse for .cjsx or PureScript or whatever is coming soon. I won't wait 10 years till they get it 'right'. I'll use Atom to get the 95% right in few months.