How could Dota increase it's popularity?

I absolutely love the game, and I think it is missed by many, in big part due to it's skill floor and the knowledge you have to have in order to not chainfeed and at least know what to do.

I believe that valve should make fun modes that act the same as regular dota which can help bring in more players. Imagine having a 2v2 map for dota with some slightly changed rules and maybe a limited hero pool for balance reasons that would have an average game time of something like 20 minutes. Maybe even a 3v3. I can see people coming to dota to play with a friend a fun 2v2 game where its the two of them playing together or even 4 friends 2v2 against each other. Eventually, once they are more familiar with the game, they try out the regular dota and its so much easier.

Any other ideas, perhaps what we could do, since valve doesn't seem to care about this too much.