Just a little bit off-topic:
I'm currently working approximately 50 % inside JetBrain's PhpStorm and 50 % inside Visual Studio.
The integration in VS with PHP Tools is just awesome. I'm having a mixed solution with C# projects and PHP projects together that interact during runtime and thanks to PHP Tools, VS even allows me to debug both C# and PHP at the same time.
This combination is second to none and I'm very happy with it.
At the same time, PhpStorm is very good at managing larger PHP projects. It has tons of features like refactoring, error detection and it even allows to integrate tools like PHPStan, Psalm and other tools right into the IDE editor.
While I assume your goals with PHP Tools are different to what PhpStorm does, I still would recommend to look at what it does and maybe you can let inspire yourself to adapt one or another feature for PHP Tools 🙂.