Well that solved some problems (e.g. importing from react-router/lib/*) but autocomplete for TSX is non-functional. Still pretty frustrating considering ES6 works out of the box.
I've been working VS Code with TypeScript regularly for over a year now. It sounds like you want to stay in Intellij, but the language services experience in VS Code is top notch for TypeScript.
I could be doing things wrong but in my exp, Webstorm's autocomplete is non-existent for anything that you import
Strange, it seems to work fine for me. Find usages on the other hand is a totally random mess.
I have the same issue for some of the libraries. I'm just starting with TS so it can be user error.
However, I found that you can download the typings in the IDE in Settings/Javascripts/Libraries and download...
This is tedious to have to do this though.
Note: doing this works with normal JS as well which is pretty cool.