This is the issue as I see it:

Oculus is going out and giving money to small but well organized studios to make small but polished games exclusively for their platform. While I dislike the exclusive nature of the Oculus store, It seems like Oculus is going a pretty good job of picking the right studios to make VR games.

Valve is lowering the barriers of all indie devs, making it easy(ish) for anyone to make a small VR game and get it up on Steam. This is attracting a large number of very amateurish devs making very unpolished early access games or simple wave based shooters.

The problem right now is that the Vive has quantity and the Rift has quality. But when it comes to games (imo) one really good game is worth a hundred shovelware games. For example, games from Skyrim with mods to DOTA 2 are the sort of games that can keep a player occupied for over a thousand hours. But many of these small unpolished games on the Vive are hard to enjoy for more than an hour.

I think what Valve needs to do is start focusing their funding on larger, more experienced game developers and get them to do what Bethesda seems to be doing: making a game (even a port of a non-VR game) that uses Steam VR and selling it on Steam, where it is available to both Rift and Vive users. This provide equal incentive to customers to buy either a Rift or a Vive, but buy their games through Steam, which is where Valve makes their profit anyway. The icing on the cake would be if Valve could get their developers (if they still have any...) to work on some killer app for the Vive. Lets get an Aperture puzzle game, or a cover-based shooter using CS:GO mechanics, or a Half Life VR game.