I work mainly in multi-project F# solutions. VS Code Ionide plug-in seems pretty solid for single project F#, but every time I've tried to use it for multi-project I run into some sort of situation that sends me back to Visual Studio.

VS has had it's own F# problems. The latest Preview edition is pretty solid, with one annoying bug. Almost every time I open my big multi-project solution I need to rebuild to get Intellisense to eliminate the red squigglies, and then close VS and re-open. It's a known issue. Hope MS fixes it soon.