No defence deals signed. Only restatement of committment from Russian side that they will make Kamov helicopter in India. But no deal signed for helicopters. No progress on this deal. Stuck at last years summit level stage.
For S-400, PAK-FA, Frigates, Nuclear submarine, no mention in joint statement that they will explore the purchase. For Rafale there was mention in joint statement of efforts to pursue the deal. No such statement with Russia.
As for Reliance having MOUs with other companies they are irrelevant. Purchase decisions are made by Indian government. They leaked to press that they are making Kamov helicopters & has bought land in Nagpur to set up assembly line. Later Russia said that they have not yet decided a partner.
Regarding approval by DAC & CCS for a deal. It only tells about India's interest in deal with certain terms. Russia has to agree for deal with those terms. So DAC & CCS approval does not mean deal will be signed.
Modi has turned India's policy pro west. Effects can be seen in Paris climate change summit & WTO Nairobi summit. India has meekly agreed to deals made by western countries harming its national interest.
Indian armed forces are also compromising Russian security interest by their zest to impress western countries. Indian Navy in joint exercise with US fielded Kilo class submarine & Akula nuclear submarine. This harms Russian interest. Now they will not sell any sophisticated weapons to India.