1… I am working on the Babylon Toolkit website and documentation to support the new Pro Versions
2… Build issues are mainly your Typescript setup. The new version have optional support for installing local node/tsc build setups per project via package.json… So you can open root project and setup the local project build environment:
npm install
3… I have been fine tuning the toolkit for commercial development the past couple years. We at MVRK have been using the toolkit to create client projects for MANY major companies. All that work was put into the newer Pro Versions
Once the website is up and working, you can purchase Pro Developer licenses to get all the built-in out of the box features that emulate that Unity Style development with advanced features like, Animation State machine that re-creating Unity Mechanim Animation Controllers, Navigation Agent And Nav Mesh Support, Advanced Rigidbody Physics, Raycast Wheeled Vehicles, Kinematic Character Controllers and more… All right out of the box
The BJS toolkit is a beast, its just there is so much to it that is hard to wrap your head around.
Once you are flowing in it though its a valuable asset. The learning curve though is kind of high even when you have some direction. Its well worth learning though.