Haxe is a great piece of technology on its own, and I am often working in it as a default, but I always caution potential users that it is more like a building block than a comprehensive package: if you want to do complex cross-platform things using Haxe, you will still want an full-time engineering team working with you to build out the full solution, since you will probably need to leverage the strengths and tooling of the target environments too. Haxe tries hard to get out of the way and give you the access you need, but builds and debugging always introduce challenges that depend on platform-specific behaviors. The quality of the results is more suggestive of the quality of the average Haxe user than the language itself doing anything magic(though it is a very sensible design).

That said, you can make some great things just sticking within the available frameworks. OpenFL is good, as is Kha. HaxeUI is definitely worth checking out(it can use multiple backends). For editing tools there's still going to be a bias towards working with Electron because of the combined set of I/O features.