Yes dear friend, it was not on Television, but it is famous on CD, it came out in Russian translation first MAhabharata and some years later Vishnupurana. Generally we like epics a lot, one the film based on Shahname and made by Tajik film studios is also one of the most liked older films in Armenia. About Ramayana I know to, but i did not see the serial, however in the Vishnupuran serial the story of Ramayana is also partly told if I remember.
About the characters You are right, but one the other hand even in real life most people are grey - everybody does his mistakes and bad deeds. I agree completely also on the figure of Krishna, as I however did not read the epic I can base myself only on this serial and some literature I read.