Just heard from a coworker after I posted this he's switching back to vim because the vim plugin for VS Code isn't quite there.
It has most of the basic stuff working. I will admit that with the auto complete and what not it isn't quite like my native vim experience. I have actually been thinking about disabling it and just trying to learn the VScode short cuts.
Numeric arguments (3dd, 2x, ...)
support for combining commands (ci[, cW, ggVG, ...)
Disclaimer: I'm on the VS Code team. Ping me on Github @waderyan or Twitter @waderyan_.
Both amVim and VSCodeVim still have problems that mean they're not drop-in replacement for even stock Vim, but most of them come down to limitations in the VSCode extension APIs at this point.
The integrated debugger via delve is absolutely great.