About DTS track, it's probably a conversion from the TrueHD track; russians do a lot of their tracks in DTS, even if quality is rather low - due to the fact they use almost always a "lector" - so mere AC3 tracks will be more than adequate most of the times...

Quality is improved in comparison to the old MPEG2 version, but I agree tha fine details are lost, and grain is virtually absent, even in comparison with the upscaled DVD I used for my project... but, it's still the best HD version of the color grading found on DVD.