I totally agree, this 'improvement' has caused me major problems. Even with a very powerful pc, I've never believed that simultaneous encoding and burning is advisable, simply because little things can go wrong such as a short sound drop out or occasional picture distortion.
The way I prefer to produce a BD is to write to folder first, check the video and audio and then burn to BD.
I've recently finished my brothers wedding video, a whopping 46 gb project! I never buy 50 gb re-writable BDs because they cost a fortune, up to £20 each. However, due to the recent issues with not being able to write to folder, I had to buy one of these discs, check to see if it was ok, copy the folders to my harddrive and then start making copies for people.
The best thing is, when I produced the DVD version, I could create a folder!!
This whole issue is a total joke, I'm fuming about it!
Alienware Aurora ALX R4 - Intel i7-4820 4.2 GHz - 32GB DDR3 RAM - Crucial 512GB SSD - 1TB Seagate HDD - 3TB WD Green HDD - 4TB WD Green HDD - MSI NVIDIA GTX 1070 8GB
Sony HDR-PJ810 and HDR-PJ530