Not to criticize the tools themselves here (Atom or Nuclide), but the process of building an enhanced X over some large base application code didn't work out well for a lot of Eclipse tools. Or at least my experience is with working with lots of Eclipse + "x" on top environments which were integrated once, then rarely touched the base Eclipse again... leading to lots of inconsistent annoyances between Eclipse/tool instances.
As an eclipse user for far to long, I understand the pain. I'd prefer if more languages/frameworks went the Golang approach and provided generic tools that can then be integrated into various editors to provide things like auto-complete and context support (oracle).
Citation needed. All I hear about Atom is that people are giving up on it.