My WAG is that the sneaky Ruskies have two cards up the sleeves. One is a weapon system that will have some effect against the navy surface ships, or one of their smaller airdef systems can actually take tacair out of the game (I think the S-300 large systems are targets if not enough of them deployed). Second and I think this the most logical, the sneaky Ruskies want some crazy mullah Akbar nutter to launch something into Ras Tanura in Saudi, hello oil prices. As for “our” side it is about the petro dollar and the flow of hydrocarbons to the West and not East (thanks Obama for making sure the white people of France has cheaper nattygas)
And I think that those sneaky Ruskies have at least one other bit of info that Obama can’t afford to leak out. That is that Assad has tons of gold belonging to European bankers (not all if any really is theirs) who reach to the USA. This gold was probably shipped/delivered to Syria by Libya’s Kadaffi before or during the moments that over 100 cruise missiles were taking him out.