I've picked up ReasonML about 3 months ago and experienced almost none of the issues you described. It's still a little rough around the edges compared to for example Elm, but the tooling, packaging, Javascript interop etc are really good IMO.
We even used Reason for writing ObjectiveC/Cocoa through CocoaScript (a Javascript-to-ObjC bridge), thanks to Reason/BuckleScript's excellent Javascript interop.
The language and compiler is rock solid - it has to be because it has been worked on for over 40 years from the days of ML. For the last three years a team of people including Hongbo Zhang, Jordan Walke, Cheng Lou and others have been actively working on Javascript tooling for OCaml, and it is an absolute pleasure to use today.
[1] Protoship Codegen - https://youtu.be/hdww16KK8S8