We also do (UHD) Blu-ray authoring. Luckily we have the Dolby Media Encoder and the Encoding Engine. That’s why we only use the external renderer on the computer with PT. But it would be nice if Nuendo could export an MP4 file. However, this would mean implementing the E-AC-3 codec in Nuendo. This would probably involve licensing costs. Maybe Steinberg should go the same way with E-AC-3 as they did with the video decoder for Avid DNxHD!? (If Dolby ever wants to make this possible.)
Can be. However, as I am not a Steinberg employee and do not have a crystal ball, I do not know. 