Yes to a degree. Both Sublime Text & Atom have auto-complete features for many languages, including Lua script, however, they will not auto-complete Visionaire Studio data structure fields, seeing as there is no way of directly tying in the VisObj system into the text editor.
I believe Simon plans on adding auto-complete to the internal VS script editor at some point in the future. Auto-complete, search & replace, & multi-line / word editing are features I heavily use in Sublime Text, which is why I write all my scripts in Sublime.
P.S: There is supposed to be a method for remotely debugging your VS scripts by a third party application. http://wiki.visionaire-tracker.net/wiki/Remote_Debugging
- It's not something I personally use as I tend to rely on my own cognitive logic & the basic errors / warnings returned in the messages log file, when I mess up!