This walkthrough is great. I always wonder how node networks get so complicated and I watched you build this one from the beginning. Thanks for the video! I hope your channel picks up soon, you have great videos. I've learned plenty just watching your process while you talk through it.
I'm not really sure. If I had to guess based off my experience using Bridge, tightening up a Blender addon isn't top of their priorities. It works SOOO much better in Unreal, it's pretty clear Blender is an afterthought to them lol
My best advice is to read their TOS because it's always updating and I believe they are supposed to make some controversial changes to it soon (or already did).