Hey, I don't recall being aware of your ever having missed anything, Pikuseru... those were fine observations. I'm sure the person running TDarkAngel/Pornve is not doing any extra work to improve matters, and I am saddened (although not surprised) that he may actually be making things worse by degrading the quality. But this is today's state of "file-sharing," somebody does the ripping, often adds ugly watermarks, does not care about the quality (as they used to generally do, way back when), and then all the other ripper-offers take this bad work and put them up in their own bad way. (Rare are those, such as the one who has given your post a "Like," who go out of their way to do things right.) A lot of folks with super-high-speed Internet capacity (I ain't one) have become accustomed to the HD versions of JAV, and there is now a recent thread (here on "Discussion") of users lamenting about how things have gone from bad to worse.
Reason why I prefer streaming is because (besides not minding the quality being less than first-rate; JAVs I love are rare, and when I encounter one, that's when I consider making the "investment" to get the fatter files) the direct downloads can be frustrating with the CAPTCHAs and the waiting times, and especially the slow speeds (note my note above for Datafile, filehoster of choice for TDarkAngel), and also streams have traditionally offered the advantage of being smaller-sized, helping me with download times and storage space. ('Course, the stream world has changed as well, and those Videomegas and Videowoods and Openloads often offer sizes that are now the same as the big fat direct downloads.)