It is unfortunate that the Lucasfilm team hasn't show the love and care for their films that the Doctor Who Restoration Team shows for their program.
That having been said... the DWRT does sometimes go a little too far in terms of "cleaning" and "restoration". I'll concede that cleaning dirt and scratches up, and locking and steadying some shaky matte shots is all well and good, but they got into a bit of a controversy when they adjusted the lighting (well, the sky, if memory serves) in a scene from a 1960s story, changing it from basically daytime (as shot and transmitted) to nighttime (as intended in terms of the story timeline). IMHO that's going a bit too far, especially when that's not presented as an "alternate angle" like they do for a lot of their stuff, like new CGI laser beams and so forth.
But despite all that, those Doctor Who DVDs are fantastic. My wife and I watched a bit of the Day of the Daleks SE, and we both marvelled at the fact that the quality on this 39 year old TV show was just incredible.