Valve has been throwing money and man-hours at Dota 2 relentlessly, but the game's playerbase is still tiny compared to LoL. I imagine they have only a couple more years to try to figure this out before the gaming zeitgeist moves away from traditional MOBAs completely.
CS:GO has been in an alternating state of either complete neglect or completely tone-deaf changes. Most patches from recent memory have been despised by the community and quickly reverted. The game seems to be the red-headed stepchild of Valve properties, run by a skeleton crew of people who don't really understand the game.
Meanwhile, Blizzard just blew the doors off the market by revitalizing a game format that Valve invented. I suspect there is a huge internal struggle at Valve right now to determine whether the company will be a content producer or a platform.